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General Instructions :
(i) All questions are compulsory.
(ii) The question paper consists of 31 questions divided into four sections – A, B, C and D.
(iii) Section A contains 4 questions of 1 mark each, Section B contains 6 questions of 2 marks each, Section C contains 10 questions of 3 marks each and Section D contains 11 questions of 4 marks each.
(iv) Use of calculated is not permitted.
Question 1
  • Q1

    What is the common difference of an A.P. in which a21 – a7 = 84? 

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  • Q2

    If the angle between two tangents drawn from an external point P to a circle of radius a and centre O, is 60°, then find the length of OP. 

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  • Q3

    If a tower 30 m high, casts a shadow 103 m long on the ground, then what is the angle of elevation of the sun? 

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  • Q4

    The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap? 

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  • Q5

    Find the value of p, for which one root of the quadratic equation px2 – 14x + 8 = 0 is 6 times the other.           

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  • Q6

    Which term of the progression 20, 1914,1812,1734, ... is the first negative term? 

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  • Q7

    Prove that the tangents drawn at the end points of a chord of a circle make equal angles with the chord. 

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  • Q8

    A circle touches all the four sides of a quadrilateral ABCD. Prove that AB + CD = BC + DA. 

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  • Q9

    A line intersects the y-axis and x-axis at the points P and Q respectively. If (2, –5) is the mid-point of PQ, then find the coordinates of P and Q. 

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  • Q10

    If the distances of P(x, y) from A(5, 1) and B(–1, 5) are equal, then prove that 3x = 2y. 

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  • Q11

    If ad ≠ bc, then prove that the equation (a2 + b2) x2 + 2 (ac + bd) x + (c2 + d2) = 0 has no real roots. 

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  • Q12

    The first term of an A.P. is 5, the last term is 45 and the sum of all its terms is 400. Find the number of terms and the common difference of the A.P. 

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  • Q13

    On a straight line passing through the foot of a tower, two points C and D are at distances of 4 m and 16 m from the foot respectively. If the angles of elevation from C and D of the top of the tower are complementary, then find the height of the tower. 

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  • Q14

    A bag contains 15 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, find the number of black balls in the bag. 

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  • Q15

    In what ratio does the point 2411, y divide the line segment joining the points P(2, –2) and Q(3, 7)? Also find the value of y. 

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  • Q16

    Three semicircles each of diameter 3 cm, a circle of diameter 4.5 cm and a semicircle of radius 4.5 cm are drawn in the given figure. Find the area of the shaded region.

     

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  • Q17

    In the given figure, two concentric circles with centre O have radii 21 cm and 42 cm. If ∠AOB = 60°, find the area of the shaded region. Use π=227

     

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  • Q18

    Water in a canal, 5·4 m wide and 1·8 m deep, is flowing with a speed of 25 km/hour. How much area can it irrigate in 40 minutes, if 10 cm of standing water is required for irrigation? 

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  • Q19

    The slant height of a frustum of a cone is 4 cm and the perimeters of its circular ends are 18 cm and 6 cm. Find the curved surface area of the frustum. 

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  • Q20

    The dimensions of a solid iron cuboid are 4·4 m × 2·6 m × 1·0 m. It is melted and recast into a hollow cylindrical pipe of 30 cm inner radius and thickness 5 cm. Find the length of the pipe. 

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  • Q21

    Solve for x:
    1x+1+35x+1=5x+4, x-1, -15, -4 

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  • Q22

    Two taps running together can fill a tank in 3113 hours. If one tap takes 3 hours more than the other to fill the tank, then how much time will each tap take to fill the tank? 

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  • Q23

    If the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27), then find the ratio of their 9th terms. 

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  • Q24

    Prove that the lengths of two tangents drawn from an external point to a circle are equal. 

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  • Q25

    In the given figure, XY and X'Y' are two parallel tangents to  circle with centre O and another tangent AB with point of contact C, is intersecting XY at A and X'Y' at B. Prove that ∠AOB = 90°.

     

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  • Q26

    Construct a triangle ABC with side BC = 7 cm, ∠B = 45°, ∠A = 105°. Then construct another triangle whose sides are 34 times the corresponding sides of the ∆ABC. 

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  • Q27

    An aeroplane is flying at a height of 300 m above the ground. Flying at this height, the angles of depression from the aeroplane of two points on both banks of a river in opposite directions are 45° and 60° respectively. Find the width of the river. [Use 3=1·732] 

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  • Q28

    If the points A(k + 1, 2k), B(3k, 2k + 3) and C(5k − 1, 5k) are collinear, then find the value of k. 

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  • Q29

    Two different dice are thrown together. Find the probability that the numbers obtained have

    (i) even sum, and
    (ii) even product. 

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  • Q30

    In the given figure, ABCD is  rectangle of dimensions 21 cm × 14 cm. A semicircle is drawn with BC as diameter. Find the area and the perimeter of the shaded region in the figure.

     

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  • Q31

    In a rain-water harvesting system, the rain-water from a roof of 22 m × 20 m drains into a cylindrical tank having diameter of base 2 m and height 3·5 m. If the tank is full, find the rainfall in cm. Write your views on water conservation. 

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