2013-2014 March

If two different dice are rolled together, the probability of getting an even number on both dice, is:

(A) 1/36

(B) 1/2

(C) 1/6

(D) 1/4

Chapter: [5.01] Probability

A ladder makes an angle of 60° with the ground when placed against a wall. If the foot of the ladder is 2 m away from the wall, then the length of the ladder (in metres) is:

(A) `4/sqrt3`

(B) `4sqrt3`

(C) `2sqrt2`

(D)4

Chapter: [4.01] Heights and Distances

In Fig. 1, QR is a common tangent to the given circles, touching externally at the point T. The tangent at T meets QR at P. If PT = 3.8 cm, then the length of QR (in cm) is :

(A) 3.8

(B) 7.6

(C) 5.7

(D) 1.9

Chapter: [3.01] Circles

n Fig. 2, PQ and PR are two tangents to a circle with centre O. If ∠QPR = 46°, then ∠QOR equals:

(A) 67°

(B) 134°

(C) 44°

(D) 46°

Chapter: [3.01] Circles

The first three terms of an AP respectively are 3y – 1, 3y + 5 and 5y + 1. Then y equals:

(A) –3

(B) 4

(C) 5

(D) 2

Chapter: [2.02] Arithmetic Progressions

The number of solid spheres, each of diameter 6 cm that can be made by melting a solid metal cylinder of height 45 cm and diameter 4 cm, is:

3

4

5

6

Chapter: [7.02] Surface Areas and Volumes

A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is:

(A) 2/3

(B) 1/6

(C) 1/3

(D) 11/30

Chapter: [5.01] Probability

If the points A(*x*, 2), B(−3, −4) and C(7, − 5) are collinear, then the value of *x* is:

(A) −63

(B) 63

(C) 60

(D) −60

Chapter: [6.01] Lines (In Two-dimensions)

If from an external point P of a circle with centre O, two tangents PQ and PR are drawn such that ∠QPR = 120°, prove that 2PQ = PO.

Chapter: [3.01] Circles

Prove that the line segment joining the points of contact of two parallel tangents of a circle, passes through its centre.

Chapter: [3.01] Circles

Solve the quadratic equation 2x^{2} + ax − a^{2} = 0 for x.

Chapter: [2.03] Quadratic Equations

Rahim tosses two different coins simultaneously. Find the probability of getting at least one tail.

Chapter: [5.01] Probability

In fig. 3, a square OABC is inscribed in a quadrant OPBQ of a circle. If OA = 20 cm, find the area of the shaded region. (Use π = 3.14)

Chapter: [7.01] Areas Related to Circles

The first and the last terms of an AP are 8 and 65 respectively. If the sum of all its terms is 730, find its common difference.

Chapter: [2.02] Arithmetic Progressions

In Fig 4, a circle is inscribed in an equilateral triangle ABC of side 12 cm. Find the radius of inscribed circle and the area of the shaded region.[Use π=3.14 and √3=1.73]

Chapter: [7.01] Areas Related to Circles

Two ships are there in the sea on either side of a light house in such a way that the ships and the light house are in the same straight line. The angles of depression of two ships as observed from the top of the light house are 60° and 45°. If the height of the light house is 200 m, find the distance between the two ships. [use √3=1.73]

Chapter: [4.01] Heights and Distances

A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank which is 10 m in diameter and 2 m deep. If the water flows through the pipe at the rate of 4 km per hour, in how much time will the tank be filled completely?

Chapter: [7.02] Surface Areas and Volumes

Draw a right triangle ABC in which AB = 6 cm, BC = 8 cm and ∠B = 90°. Draw BD perpendicular from B on AC and draw a circle passing through the points B, C and D. Construct tangents from A to this circle.

Chapter: [3.03] Constructions

In Fig.5, PSR, RTQ and PAQ are three semicircles of diameters 10 cm, 3 cm and 7 cm respectively. Find the perimeter of the shaded region. [Use π=3.14]

Chapter: [7.01] Areas Related to Circles

If the seventh term of an AP is 1/9 and its ninth term is 1/7, find its 63^{rd} term.

Chapter: [2.02] Arithmetic Progressions

A solid metallic right circular cone 20 cm high and whose vertical angle is 60°, is cut into two parts at the middle of its height by a plane parallel to its base. If the frustum so obtained be drawn into a wire of diameter 1/12 cm, find the length of the wire.

Chapter: [7.02] Surface Areas and Volumes

If the points A(−1, −4), B(*b*, *c*) and C(5, −1) are collinear and 2*b* + *c* = 4, find the values of *b* and *c*.

Chapter: [6.01] Lines (In Two-dimensions)

If the point P(2, 2) is equidistant from the points A(−2, *k*) and B(−2*k*, −3), find *k*. Also find the length of AP.

Chapter: [6.01] Lines (In Two-dimensions)

Solve the equation:`14/(x+3)-1=5/(x+1); xne-3,-1` , for x

Chapter: [2.03] Quadratic Equations

Sushant has a vessel, of the form of an inverted cone, open at the top, of height 11 cm and radius of top as 2.5 cm and is full of water. Metallic spherical balls each of diameter 0.5 cm are put in the vessel due to which 2/5 th of the water in the vessel flows out. Find how many balls were put in the vessel. Sushant made the arrangement so that the water that flows out irrigates the flower beds. What value has been shown by Sushant?

Chapter: [7.02] Surface Areas and Volumes

The angles of elevation and depression of the top and the bottom of a tower from the top of a building, 60 m high, are 30° and 60° respectively. Find the difference between the heights of the building and the tower and the distance between them.

Chapter: [4.01] Heights and Distances

Prove that a parallelogram circumscribing a circle is a rhombus.

Chapter: [3.01] Circles

Find the ratio in which the point P(*x*, 2) divides the line segment joining the points A(12, 5) and B(4, −3). Also, find the value of *x*.

Chapter: [6.01] Lines (In Two-dimensions)

In an AP of 50 terms, the sum of first 10 terms is 210 and the sum of its last 15 terms is 2565. Find the A.P.

Chapter: [2.02] Arithmetic Progressions

From a solid cylinder of height 2.8 cm and diameter 4.2 cm, a conical cavity of the same height and same diameter is hollowed out. Find the total surface area of the remaining solid [take π=22/7]

Chapter: [7.02] Surface Areas and Volumes

Find the value of *p* for which the quadratic equation (2*p* + 1)*x*^{2} − (7*p* + 2)x + (7*p* − 3) = 0 has equal roots. Also find these roots.

Chapter: [2.03] Quadratic Equations

Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is an odd number.

Chapter: [5.01] Probability

Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is a perfect square number.

Chapter: [5.01] Probability

Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is divisible by 5

Chapter: [5.01] Probability

Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is a prime number less than 20.

Chapter: [5.01] Probability

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

Chapter: [3.01] Circles

The difference of two natural numbers is 5 and the difference of their reciprocals is 5/14. Find the numbers.

Chapter: [2.01] Pair of Linear Equations in Two Variables

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