{"id":50419,"date":"2024-02-01T14:47:19","date_gmt":"2024-02-01T09:17:19","guid":{"rendered":"https:\/\/apboardsolutions.com\/?p=50419"},"modified":"2024-02-05T15:06:19","modified_gmt":"2024-02-05T09:36:19","slug":"ap-10th-class-maths-model-paper-set-2","status":"publish","type":"post","link":"https:\/\/apboardsolutions.com\/ap-10th-class-maths-model-paper-set-2\/","title":{"rendered":"AP 10th Class Maths Model Paper Set 2 with Solutions"},"content":{"rendered":"
Regularly solving\u00a0AP 10th Class Maths Model Papers<\/a> Set 2 contributes to the development of problem-solving skills.<\/p>\n Instructions :<\/span><\/p>\n Section – I <\/span> Note:<\/p>\n Question 1. Explanation: Question 2. <\/p>\n Question 3. Question 4. Question 5. Question 6. Question 7. Question 8. Question 9. Question 10. <\/p>\n Question 11. Question 12. SECTION – II<\/span> Note:<\/p>\n Question 13. Question 14. Question 15. Question 16. Question 17. Question 18. Question 19. <\/p>\n Question 20. Section – III<\/span> Note:<\/p>\n Question 21. Question 22. Question 23. i) So, the event that Malini takes an orange flavoured candy is an Impossible event. So, the corresponding probability is zero. Question 24. ii) {2, 4, 6, 8, 10} \u2260 {x : x = 2n + 1 and x \u2208 N) iii) {15, 15, 30, 45) \u2260 {x : x is a multiple of 15} iv) {2, 3, 5, 7,9) \u2260 {x : x is a prime number} Question 25. Question 26. Question 27. Question 28. Section – IV<\/span> Note:<\/p>\n Question 29. (OR)<\/p>\n b) If A = {X : X is a natural number} Find: (0.23)y<\/sup> = 1000 \u2234 \\(10^{\\frac{3}{x}}\\) = \\(10^{\\frac{3}{\\mathrm{y}}+1}\\) b) i) A \u2229 B ii) A – C iii) A – D iv) B \u222a C <\/p>\n Question 30. (OR)<\/p>\n b) One card is drawn from a well shuffled deck of 52 cards. Find the probability of getting: b) Total number of cards in a deck = 52 i) A king of red colour ii) A queen of diamonds. iii) A jack of spade iv) A black face card. Question 31. (OR)<\/p>\n b) An iron pillar consists of a cylindrical portion of 2.8 m. height and 20 cm. in diameter and a cone of 42 cm. height surmounting it. Find the weight of the pillar if 1 cm3<\/sup> of iron weighs 7.5 g. Since AB = BC = CD = DA and AC = BD. So all the four sides of the quadrilateral ABCD are equal and its diagonals AC and BD are also equal. b) Height of the cylinder portion = 2.8 m = 280 cm Question 32. (OR)<\/p>\n b) The following data gives the information on the observed life time (in hours) of 225 electrical components.<\/p>\n Determine the modal life time of the components. b) 61 is the highest frequency corresponding to the class interval 60 – 80. <\/p>\n Question 33. Justification: b) Steps of construction:<\/p>\n Regularly solving\u00a0AP 10th Class Maths Model Papers Set 2 contributes to the development of problem-solving skills. AP SSC Maths Model Paper Set 2 with Solutions Instructions : In the duration of 3hours 15 minutes, 15 minutes of time is allotted to read the question paper. All answers shall be written in the answer booklet only. … Read more<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[2],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/posts\/50419"}],"collection":[{"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/comments?post=50419"}],"version-history":[{"count":14,"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/posts\/50419\/revisions"}],"predecessor-version":[{"id":50669,"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/posts\/50419\/revisions\/50669"}],"wp:attachment":[{"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/media?parent=50419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/categories?post=50419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/apboardsolutions.com\/wp-json\/wp\/v2\/tags?post=50419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}AP SSC Maths Model Paper Set 2 with Solutions<\/h2>\n
\n
\n(12 \u00d7 1 = 12M)<\/span><\/p>\n\n
\nIf A = {1, 2, 3, 4, 5} B = {4, 5, 6, 7}, then A – B is ?
\nA) {1, 2, 3}
\nB) {4, 5}
\nC) {6, 7}
\nD) {1, 2, 3, 4, 5}
\nSolution:
\nA) {1, 2, 3}<\/p>\n
\nA – B = {1, 2, 3, 4, 5} – {4, 5, 6, 7) = {1, 2, 3}<\/p>\n
\nThe number of parallel tangents drawn at the end points of a diameter is ………..
\nSolution:
\n2<\/p>\n
\nWhen the line of sight is below the horizontal line, then the angle between the line of sight and horizontal line is called ……..
\nSolution:
\nAngle of depression<\/p>\n
\nFind the mode of the data : 5, 6, 9, 10, 6, 12, 3, 6, 11, 10, 4, 6, 7.
\nSolution:
\n6<\/p>\n
\nStatement \u2018p\u2019 : 2, 3, 5, 7, 8, 10, 15 …… are in G.P.
\nStatement \u2018q\u2019 : -1, -3, -5, -7, ……. are in A.P.
\nA) p\u2019 and \u2018q\u2019 both are true
\nB) \u2018p\u2019 and \u2018q\u2019 both are false
\nC) \u2018p\u2019 is true \u2018q\u2019 is false
\nD) \u2018p\u2019 is false q\u2019 is true
\nSolution:
\nD) \u2018p\u2019 is false q\u2019 is true<\/p>\n
\nMatch the following:
\n
\nChoose the correct answer.
\nA) a-i, b-ii, c-iii
\nB) a – ii, b – iii, c – i
\nC) a – iii, b – i, c – ii
\nD) a – iii, b – ii, c – i
\nSolution:
\nC) a – iii, b – i, c – ii<\/p>\n
\nWhat is the last digit of 62023<\/sup> ?
\nSolution:
\n6<\/p>\n
\nWrite the general form of a linear equation in two variables.
\nSolution:
\nax + by + c = 0 (a2<\/sup> + b2<\/sup>, \u2260 0)<\/p>\n
\nIf \u03b8 is the angle made by the line with X-axis in positive direction, the slope m = ………
\nA) Sin \u03b8
\nB) Cos \u03b8
\nC) Tan \u03b8
\nD) Sec \u03b8
\nSolution:
\nC) Tan \u03b8<\/p>\n
\nPythagorean triplets are the sides of a …….
\nA) acute angled triangle
\nB) right angled triangle
\nC) obtuse angled triangle
\nD) All of these
\nAnswer:
\nB) right angled triangle<\/p>\n
\nWrite the equation with roots \\(\\frac{1}{\\alpha}\\) and \\(\\frac{1}{\\beta}\\)?
\nSolution:
\ncx2<\/sup> + bx + a = 0<\/p>\n
\nThe graph of y = p(x) is given in the adjacent figure, then the number of zeroes of p (x) is…….
\n
\nA) 0
\nB) 1
\nC) 2
\nD) 3
\nSolution:
\nD) 3<\/p>\n
\n(8 \u00d7 2 = 16 M)<\/span><\/p>\n\n
\nFind the value of Log2<\/sub>32.
\nSolution:
\nLet log2<\/sub> 32 be x \u21d2 log2<\/sub> 32 = x
\n2x<\/sup> = 32
\n2x<\/sup> = 25<\/sup>
\n\u2234 x = 5
\n\u2234 log2<\/sub>32 = 5<\/p>\n
\nFind the midpoint of the line segment joining the points (2, 7) and (12, – 7).
\nSolution:
\nThe midpoint of the line segment joining the points (2, 7) and (12, -7) is
\n= \\(\\left(\\frac{x_1+x_2}{2}, \\frac{y_1+y_2}{2}\\right)\\) = \\(\\left(\\frac{2+12}{2}, \\frac{7+(-7)}{2}\\right)\\)
\n= \\(\\left(\\frac{16}{2}, \\frac{0}{2}\\right)\\) = (8, 0)<\/p>\n
\nA ladder 5 m. long reaches a window of building 4 m. above the ground. Determine the distance of the foot of the ladder from the building.
\nSolution:
\nLength of a ladder = AC = 5 m
\nHeight of a window = AB = 4 m
\nLet the distance of the foot of the ladder from the building = BC = x m
\nFrom \u2206ABC, \u2220B = 90\u00b0
\nBy Pythagores theorem;
\n52<\/sup> = 42<\/sup> + x2<\/sup>
\n25 = 16 + x2<\/sup>
\n
\nx2<\/sup> = 25 – 16
\nx2<\/sup> = 9
\nx = \\(\\sqrt{9}\\) = 3 m
\nThe distance of the foot of the ladder from the building = 3 m.<\/p>\n
\nEvaluate
\n
\nSolution:
\ncosec 55\u00b0 cosec (90\u00b0 – 35\u00b0) = sec 35\u00b0
\n[\u2235 cosec (90\u00b0 – \u03b8) = sec \u03b8]
\n\u2234
\n
\n= \\(\\frac{\\sec 35^{\\circ}}{\\sec 35^{\\circ}}\\) = 1<\/p>\n
\nCan \\(\\frac{3}{2}\\) be the probability of an event? Explain.
\nSolution:
\nNo, \\(\\frac{3}{2}\\) cant be the probability of an event.
\nThe probability of an event is always lies between 0 and 1
\ni.e 0 \u2264 P(E) \u2264 1
\nBut \\(\\frac{3}{2}\\) = 1.5, it is not lies between 0 and 1<\/p>\n
\nIn G. P. an<\/sub> = arn-1<\/sup>. Explain the terms ‘a’ and ‘r’.
\nSolution:
\nIn G.P. an = a.rn-1<\/sup>
\na = first term of G.P
\nr = common ratio
\nn = number of terms of G.P<\/p>\n
\nFind the value of ‘k’ for which the pair of equations 2x – ky + 3 = 0, 4x + 6y – 5 = 0 represent parallel lines.
\nSolution:
\nGiven pair of equations
\n2x – ky + 3 = 0 and 4x + 6y – 5 = 0
\na1<\/sub> = 2 ; b1<\/sub> = -k ; c1<\/sub> = 3;
\na2<\/sub> = 4 ; b2<\/sub> = 6 ; c2<\/sub> = -5
\nGiven the pair of lines are parallel
\n\u2234 \\(\\frac{a_1}{a_2}\\) = \\(\\frac{b_1}{b_2}\\) \u2260 \\(\\frac{c_1}{c_2}\\) ; \\(\\frac{a_1}{a_2}\\) = \\(\\frac{b_1}{b_2}\\) \u21d2 \\(\\frac{2}{4}\\) \\(\\frac{-k}{6}\\)
\n\u21d2 -4k = 2 \u00d7 6 \u21d2 -4k = 12 \u21d2 k = \\(\\frac{12}{-4}\\) = -3<\/p>\n
\nFrom the given figure, find A U B and A \u2229 B
\n
\nSolution:
\nFrom venn diagram
\nA \u222a B = {5, 6, 7, 8, 9, 10}; A \u2229 B = {7, 8}<\/p>\n
\n(8 \u00d7 4 = 32 M)<\/span><\/p>\n\n
\nFind a quadratic polynomial whose zeroes are 2 and –\\(\\frac{1}{3}\\).
\nSolution:
\nLet the quadratic polynomial be ax2<\/sup> + bx + c, a \u2260 0 and its be \u03b1 and \u03b2. Here \u03b1 = 2, \u03b2 = \\(\\frac{-1}{3}\\)
\nSum of the zeroes = (\u03b1 + \u03b2)
\n= 2 + \\(\\left(\\frac{-1}{3}\\right)\\) = \\(\\frac{5}{3}\\)
\nProduct of the zeroes = (\u03b1\u03b2)
\n= \\(2\\left(\\frac{-1}{3}\\right)\\) = \\(\\frac{-2}{3}\\)
\nTherefore the quadratic polynomial
\nax2<\/sup> + bx + c is k[x2<\/sup> – (\u03b1 + \u03b2)x + \u03b1\u03b2], where k is a constant = k[x2<\/sup> – \\(\\frac{5}{3}\\)x – \\(\\frac{2}{3}\\)]
\nWe can put different values of k.
\nWhen k = 3, the quadratic polynomial will be 3x2<\/sup> – 5x – 2.<\/p>\n
\nWhich term of the A, P.: 3, 8, 13, 18, ……. is 78?
\nSolution:
\nHere a = 3; d = 8 – 3 = 5 and if an<\/sub> = 78 we have to find n.
\nWe have an<\/sub> = a + (n – 1)d
\n78 = 3 + (n – 1)5
\n78 = 3 + 5n – 5
\n78 = 5n – 2
\n5n = 78 + 2
\n5n = 80
\nn = \\(\\frac{80}{5}\\) = 16
\nTherefore the 16th<\/sup> term of the given AP is 78.<\/p>\n
\nA bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the proba-bility that she takes out
\n(i) an orange flavoured candy?
\n(ii) a lemon flavoured candy?
\nSolution:
\nThe bag contains only lemon flavoured candies.<\/p>\n
\nii) The event that Malini takes a lemon flavoured candy is certain event. So, the corresponding probability is 1.<\/p>\n
\nState the reasons for the following :
\ni) {1, 2, 3, ……, 10} \u2260 {x : x \u2208 N and 1< x < 10} ii) {2, 4 > 6, 8, 10} \u2260 {x : x = 2n + 1 and n \u2208 N]
\niii) {5, 15, 30, 45} \u2260 {x : x is a multiple of 15}
\niv) {2, 3, 5, 7, 9} \u2260 {x : x is a prime number}
\nSolution:
\ni) {1, 2, 3, ……., 10) \u2260 {2, 3, 4, 5, 6, 7, 8, 9}
\nIn LHS set contains 1 and 10 are elements but in RHS they are not the elements of that set.<\/p>\n
\n{2, 4, 6, 8, 10} \u2260 {3, 5, 7, 9 ……….}
\nLHS is a set of even numbers less than 10. It is a finite set.
\nBut RHS is a set of odd numbers. It is an infinite set.<\/p>\n
\n5 is not a multiple of 15.<\/p>\n
\n9 is not a prime number.<\/p>\n
\nProve that
\n
\nSolution:
\n<\/p>\n
\nWrite the formula to find the median of the grouped data and explain its terms.
\nSolution:
\nMedian = l + \\(\\frac{\\frac{n}{2}-c f}{f}\\) \u00d7 h
\nWhere l = lower limit of the median class.
\nh = length of the median class.
\nf = frequency of the median class.
\ncf = cumulative frequency of the class preceeding the median class.<\/p>\n
\nCalculate the length of a tangent from a point 15 cm away from the centre of a circle of radius 9 cm.
\nSolution:
\nIt is given that radius (r) = 9 cm
\nOQ(d) = 15 cm
\n<\/p>\n
\nFind the roots of
\n(i) \\(\\frac{1}{x+4}\\) – \\(\\frac{1}{x-7}\\) = \\(\\frac{11}{30}\\); x \u2260 -4, 7
\nSolution:
\n
\nwhich is a quadratic equation.
\nHere a = 1 ; b = -3; c = 2;
\nSo, b2<\/sup> – 4ac = (-3)2<\/sup> – 4(1)(2)
\n= 9 – 8 = 1 > 0
\nTherefore x = \\(\\frac{-(-3) \\pm \\sqrt{1}}{2 \\times 1}\\) = \\(\\frac{3 \\pm 1}{2}\\)
\nx = \\(\\frac{3+1}{2}\\) = \\(\\frac{4}{2}\\) = 2
\nx = \\(\\frac{3-1}{2}\\) = \\(\\frac{2}{2}\\) = 1
\n\u2234 The roots are 1, 2<\/p>\n
\n(5 \u00d7 8 = 40 M)<\/span><\/p>\n\n
\na) If (2.3)x<\/sup> = (0.23)y<\/sup> = 1000, then find the value of \\(\\frac{1}{x}\\) – \\(\\frac{1}{y}\\)<\/p>\n
\nB = {X : X is an even natural number}
\nC = {X : X is a odd natural number) and
\nD = {X : X is a prime number}<\/p>\n
\ni) A \u222a B
\nii) A – C
\niii) A – D
\niv) B \u222a C
\nSolution:
\na) (2.3)x<\/sup> = (0.23)y<\/sup> = 1000
\n(2.3)x<\/sup> = 1000;
\n(2.3)x<\/sup> = 103<\/sup>
\n2.3 = \\(10^{\\frac{3}{x}}\\);
\n2.3 = \\(10^{\\frac{3}{x}}\\);
\n2.3 = \\(10^{\\frac{3}{x}}\\);<\/p>\n
\n(0.23)y<\/sup> = 103<\/sup>
\n0.23 = \\(10^{\\frac{3}{y}}\\)
\n\\(\\frac{2.3}{10}\\) = \\(10^{\\frac{3}{y}}\\)
\n2.3 = \\(10^{\\frac{3}{y}}\\) \u00d7 101<\/sup>
\n= \\(10^{\\frac{3}{y}+1}\\)<\/p>\n
\n\\(\\frac{3}{x}\\) = \\(\\frac{3}{y}\\) + 1
\n3(\\(\\frac{3}{x}\\)) = 3(\\(\\frac{1}{y}\\) + \\(\\frac{1}{3}\\))
\n\\(\\frac{1}{x}\\) = \\(\\frac{1}{y}\\) + \\(\\frac{1}{3}\\)
\n\u2234 \\(\\frac{1}{x}\\) – \\(\\frac{1}{y}\\) = \\(\\frac{1}{3}\\)<\/p>\n
\nA {x : x is a natural number}
\n= {1, 2, 3, 4, 5, 6, 7, 8……..}
\nB = {x : x is an even natural number}
\n= {2, 4, 6, 8…….}
\nC = {x : x is an odd natural number)
\n= {1, 3, 5, 7,…….. }
\nD = {x : x is a prime number)
\n= {2, 3, 5, 7,……..}<\/p>\n
\n{1, 2, 3, 4, 5, 6, 7, 8……} \u2229 {2, 4, 6, 8…….}
\n= {2, 4, 6, 8……. }
\n= {even natural numbers)<\/p>\n
\nA – C = {1, 2, 3, 4, 5, 6, 7, 8……} – {1, 3, 5, 7…….}
\n= {2, 4, 6, 8………..}
\n= (even natural numbers)<\/p>\n
\n= {1, 2, 3, 4, 5, 6, 7, 8…….} – {2, 3, 5, 7……..}
\n= {1, 4, 6, 8……}<\/p>\n
\nB \u222a C = {2, 4, 6, 8……} \u222a {1, 3, 5, 7……}
\n= {1, 2, 3, 4, 5, 6, 7, 8…..}
\n= {natural numbers}<\/p>\n
\na) Solve the equations by reducing them to a pair of linear equations. \\(\\frac{1}{3 x+y}\\) + \\(\\frac{1}{3 x-y}\\) = \\(\\frac{3}{4}\\)
\n\\(\\frac{1}{2(3 x+y)}\\) + \\(\\frac{1}{2(3 x-y)}\\) = \\(\\frac{-1}{8}\\)<\/p>\n
\ni) a king of red colour
\nii) a queen of diamonds
\niii) a jack of spade
\niv) a black face card
\nSolution:
\na) \\(\\frac{1}{3 x+y}\\) + \\(\\frac{1}{3 x-y}\\) = \\(\\frac{3}{4}\\) …….. (1)
\n\\(\\frac{1}{2}\\left(\\frac{1}{3 x+y}\\right)\\) – \\(\\frac{1}{2}\\left(\\frac{1}{3 x-y}\\right)\\) = \\(\\frac{-1}{8}\\) …… (2)
\nIf we substitute \\(\\frac{1}{3 x+y}\\) = p and \\(\\frac{1}{3 x-y}\\) = p we get a pair of linear equations:
\np + q = \\(\\frac{3}{4}\\) \u21d2 4p + 4q = 3 …….. (3)
\n\\(\\frac{1}{2}\\)p – \\(\\frac{1}{2}\\)q = \\(\\frac{-1}{8}\\) \u21d2 4p – 4q = -1 …….. (4)
\nElimination Method:
\n
\nSubstitute the value of x in (5)
\n3(1) + y = 4
\n3 + y = 4
\n\u2234 y = 4 – 3 = 1
\n\u2234 x = 1 ; y = 1<\/p>\n
\nTotal possible outcomes =52<\/p>\n
\nLet E be the event of getting a king of red colour
\nNumber of favourable outcomes to event
\n(E) = 2
\nProbability of an event P(E)
\n\\(=\\frac{\\text { No. of favourable outcomes }}{\\text { Total possible outcomes }}\\)
\n= \\(\\frac{2}{52}\\) = \\(\\frac{1}{26}\\)<\/p>\n
\nLet \u2018F\u2019 be the event of getting a queen of diamonds
\nNumber of favourable outcomes to event F = 1
\nProbability of an event p(F) = \\(\\frac{1}{52}\\)<\/p>\n
\nLet \u2018G\u2019 be the event of getting a jack of spade.
\nNumber of favourable outcomes to event G = 1
\nProbability of an event P(G) = \\(\\frac{1}{52}\\)<\/p>\n
\nLet \u2018H be the event of getting a black face card.
\nNumber of favourable outcomes to getting event
\nH = 6
\nProbability of an event G = P(H) = \\(\\frac{6}{52}\\)
\n= \\(\\frac{3}{26}\\)<\/p>\n
\na) Show that the points (1, 7), (4, 2), (-1, -1) and (-4, 4) are the vertices of a square.<\/p>\n
\nSolution:
\na) Let A (1, 7), B(4, 2), C(-1, -1) and D (-4, 4) be the given points.
\nOne way of showing that ABCD is a square is to use the property that all its sides should be equal and both its digonals should also be equal. Now
\n
\n= \\(\\sqrt{4+64}\\) = \\(\\sqrt{68}\\) units
\nBD = \\(\\sqrt{(4+4)^2+(2-4)^2}\\) = \\(\\sqrt{64+4}\\) = \\(\\sqrt{68}\\) units<\/p>\n
\nTherefore, ABCD is square.<\/p>\n
\nDiameter of the cylinder = 20 cm
\nRadius of the cylinder = \\(\\frac{20}{2}\\) cm = 10 cm
\nVolume of the cylinder = \u03c0r2<\/sup>h
\n= \\(\\frac{22}{7}\\) \u00d7 10 \u00d7 10 \u00d7 280 cm3<\/sup>
\n= 88000 cm3<\/sup>
\nHeight of the cone (h) = 42 cm
\nRadius of the cone (r) = 10 cm
\nVolume of the cone (v) = \\(\\frac{1}{3}\\)\u03c0r2<\/sup>h
\n= \\(\\frac{1}{3}\\) \u00d7 \\(\\frac{22}{7}\\) \u00d7 10 \u00d7 10 \u00d7 42 cm3<\/sup> = 4400 cm3<\/sup>
\nVolume of the pillar
\n= 88000 cm3<\/sup> + 4400 cm3<\/sup>
\n= 92400 cm3<\/sup>
\nWeight of 1 cm3<\/sup> of iron = 7.5 g
\nWeight of the pillar = 7.5 \u00d7 92400 g
\n= 693000 g
\n= 693 kg<\/p>\n
\na) A tree breaks due to storm and the broken part bends so that the top of the tree touches the ground by making 300 angle with the ground. The distance between the foot of the tree and the top of the tree on the ground is 6 m. Find the height of the tree before falling down.<\/p>\n\n\n
\n Life times
\n(in hrs)<\/td>\n0-20<\/td>\n 20-40<\/td>\n 40-60<\/td>\n 60-80<\/td>\n 80-100<\/td>\n 100-120<\/td>\n<\/tr>\n \n Frequency<\/td>\n 10<\/td>\n 35<\/td>\n 52<\/td>\n 61<\/td>\n 38<\/td>\n 29<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nSolution:
\na) Let Initial height of tree be AD when storm come, the tree which is broken at B and top touches the
\nground at C.
\n\u2234 height of tree = AB + BC
\nAC = 6 m
\n
\nIn \u2206ABC, \u2220A = 90\u00b0, \u2220C = 30\u00b0
\ntan C = tan 30\u00b0 = \\(\\frac{1}{\\sqrt{3}}\\)
\n<\/p>\n
\nSo, modal class : 60-80
\nl = lower limit of the modal class = 60
\nf1<\/sub> = frequency of the modal class = 61
\nh = modal class length = 20
\nf0<\/sub> = frequency of the preceeding class to 60 – 80 = 52
\nf2<\/sub> = frequency of the suceeding class to 60 – 80 = 38
\nf1<\/sub> – f0<\/sub> = 61 – 52 = 9
\n2f1<\/sub> – f0<\/sub> – f2<\/sub> = 2 \u00d7 61 – 52 – 38 = 122 – 90 = 32
\nSo,
\n
\nTherefore more electrical components have life time of 65.625 hours.<\/p>\n
\na) Draw the graph of the polynomial p(x) = x2<\/sup> – x – 12 and find the zeroes.
\n(OR)
\nb) Construct a triangle of sides 4 cm, 5 cm and 6 cm. Then, construct a triangle similar to it, whose sides are \\(\\frac{2}{3}\\) of the corresponding sides of the first triangle.
\nSolution:
\na) p(x) = x2<\/sup> – x – 12; y = x2<\/sup> – x – 12
\n<\/p>\n
\n-3 and 4 are zeroes of the quadratic polynomial because (-3, 0) and (4, 0) are intersection points of X axis.<\/p>\n
\nx2<\/sup> – x – 120 \u21d2 x2<\/sup> – 4x + 3x – 12.
\n0 \u21d2 (x – 4) (x + 3) = 0
\nx – 4 = 0 and x + 3 = 0
\nx = 4, x = -3 zeroes of p(x) = -3, 4.<\/p>\n
\n<\/p>\n\n
\nSo, \u2206A’BC’ is the required triangle.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"