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Board Paper of Class 10 2013 Maths Delhi(SET 2) - Solutions

General Instructions:
(i) All questions are compulsory.
(ii) The question paper consists of 34 questions divided into four sections A, B, C and D.
(iii) Sections A contains 8 questions of one mark each, which are multiple choice type questions, section B contains 6 questions of two marks each, section C contains 10 questions of three marks each, and section D contains 10 questions of four marks each.
(iv) Use of calculators is not permitted.
  • Question 1

    If the difference between the circumference and the radius of a circle is 37 cm, then using, the circumference (in cm) of the circle is:

    (A) 154

    (B) 44

    (C) 14

    (D) 7

    VIEW SOLUTION
  • Question 2

    The angle of depression of a car, standing on the ground, from the top of a 75 m high tower, is 30°. The distance of the car from the base of the tower (in m.) is:

    (A)

    (B)

    (C)

    (D) 150

    VIEW SOLUTION
  • Question 3

    The probability of getting an even number, when a die is thrown once, is :

    (A)

    (B)

    (C)

    (D)

    VIEW SOLUTION
  • Question 4

    In Fig. 1, PA and PB are two tangents drawn from an external point P to a circle with centre C and radius 4 cm. If PA ⊥ PB, then the length of each tangent is:

    (A) 3 cm

    (B) 4 cm

    (C) 5 cm

    (D) 6 cm

    VIEW SOLUTION
  • Question 5

    In Fig.2, a circle with centre O is inscribed in a quadrilateral ABCD such that, it touches the sides BC, AB, AD and CD at points P, Q, R and S respectively, If AB = 29 cm, AD = 23 cm, ∠B = 90° and DS = 5 cm, then the radius of the circle (in cm.) is:

    (A) 11

    (B) 18

    (C) 6

    (D) 15

    VIEW SOLUTION
  • Question 6

    In Fig. 3, the area of triangle ABC (in sq. units) is:

    (A) 15

    (B) 10

    (C) 7.5

    (D) 2.5

    VIEW SOLUTION
  • Question 7

    A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a prime-number less than 23, is :

    (A)

    (B)

    (C)

    (D)

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  • Question 8

    The common difference of the AP is:

    (A) p

    (B) −p

    (C) −1

    (D) 1

    VIEW SOLUTION
  • Question 9

    Two circular pieces of equal radii and maximum area, touching each other are cut out from a rectangular card board of dimensions 14 cm × 7 cm. Find the area of the remaining card board.

    VIEW SOLUTION
  • Question 10

    Solve the following quadratic equation for x:

    VIEW SOLUTION
  • Question 11

    Prove that the parallelogram circumscribing a circle is a rhombus.

    VIEW SOLUTION
  • Question 12

    How many three − digit natural numbers are divisible by 7?

    VIEW SOLUTION
  • Question 13

    In Fig. 4, a circle inscribed in triangle ABC touches its sides AB, BC and AC at points D, E and F respectively. If AB = 12 cm, BC = 8 cm and AC = 10 cm, then find the lengths of AD, BE and CF.

    VIEW SOLUTION
  • Question 14

    A die is tossed once. Find the probability of getting an even number or a multiple of 3.

    VIEW SOLUTION
  • Question 15

    In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find: (i) the length of the arc (ii) area of the sector formed by the arc.

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  • Question 16

    A wooden toy was made by scooping out a hemisphere of same radius from each end of a solid cylinder. If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm, find the volume of wood in the toy.

    VIEW SOLUTION
  • Question 17

    A vessel is in the form of hemispherical bowl surmounted by a hollow cylinder of same diameter. The diameter of the hemispherical bowl is 14 cm and the total height of the vessel is 13 cm. Find the total surface area of the vessel.

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  • Question 18

    Find the ratio in which the y-axis divides the line segment joining the points (−4, − 6) and (10, 12). Also find the coordinates of the point of division.

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  • Question 19

    In Fig.5, AB and CD are two diameters of a circle with centre O, which are perpendicular to each other. OB is the diameter of the smaller circle. If OA = 7 cm, find the area of the shaded region.

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  • Question 20

    The horizontal distance between two poles is 15 m. The angle of depression of the top of first pole as seen from the top of second pole is 30°. If the height of the second pole is 24 m, find the height of the first pole.

    VIEW SOLUTION
  • Question 21

    Prove that the points A(0, −1), B(−2, 3), C(6, 7) and D(8, 3) are the vertices of a rectangle ABCD?

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  • Question 22

    Draw a triangle PQR in which QR = 6 cm, PQ = 5 cm and times the corresponding sides of ΔPQR?

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  • Question 23

    The nth term of an AP is given by (−4n + 15). Find the sum of first 20 terms of this AP.

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  • Question 24

    For what value of k, the roots of the quadratic equation are equal?

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  • Question 25

    A bucket open at the top, and made up of a metal sheet is in the form of a frustum of a cone. The depth of the bucket is 24 cm and the diameters of its upper and lower circular ends are 30 cm and 10 cm respectively. Find the cost of metal sheet used in it at the rate of Rs 10 per 100 cm2. [Use π = 3.14]

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  • Question 26

    Water is flowing through a cylindrical pipe, of internal diameter 2 cm, into a cylindrical tank of base radius 40 cm, at the rate of 0.4 m/s. Determine the rise in level of water in the tank in half an hour.

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  • Question 27

    A Group consists of 12 persons, of which 3 are extremely patient, other 6 are extremely honest and rest are extremely kind. A person from the group is selected at random. Assuming that each person is equally likely to be selected, find the probability of selecting a person who is (i) extremely patient (ii) extremely kind or honest.

    Which of the above values you prefer more?

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  • Question 28

    In fig. 6, l and m are two parallel tangents to a circle with centre O, touching the circle at A and B respectively. Another tangent at C intersects the line l at D and m at E. Prove that ∠DOE = 90°.

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  • Question 29

    Prove that the tangent at any point of a circle is perpendicular to the radius through the point of contact.

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  • Question 30

    Sum of the areas of two squares is 400 cm2. If the difference of their perimeters is 16 cm, find the sides of the two squares.

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  • Question 32

    Find the value of x for which the points (x, −1), (2, 1) and (4, 5) are collinear.

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  • Question 33

    From a point P on the ground, the angle of elevation of the top of a 10 m tall building is 30°. A flagstaff is fixed at the top of the building and the angle of elevation of the top of the flagstaff from P is 45°. Find the length of the flagstaff and the distance of the building from the point P.

    VIEW SOLUTION
  • Question 34

    The 24th term of an AP is twice its 10th term. Show that its 72nd term is 4 times its 15th term.

    VIEW SOLUTION
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