Date: March 2015

In Fig. 1, PA and PB are tangents to the circle with centre O such that ∠APB = 50°. Write the measure of ∠OAB.

Chapter: [0.031] Circles [0.031] Circles

If x=−`1/2`, is a solution of the quadratic equation 3x^{2}+2kx−3=0, find the value of k

Chapter: [0.023] Quadratic Equations

The tops of two towers of height *x *and *y,* standing on level ground, subtend angles of 30° and 60° respectively at the centre of the line joining their feet, then find *x*, *y*.

Chapter: [0.040999999999999995] Heights and Distances

A letter of English alphabet is chosen at random. Determine the probability that the chosen letter is consonant.

Chapter: [0.051] Probability [0.051] Probability

From a point T outside a circle of centre O, tangents TP and TQ are drawn to the circle. Prove that OT is the right bisector of line segment PQ.

Chapter: [0.031] Circles [0.031] Circles

Find the middle term of the A.P. 6, 13, 20, ... , 216.

Chapter: [0.022000000000000002] Arithmetic Progressions

In Fig. 2, AB is the diameter of a circle with centre O and AT is a tangent. If ∠AOQ = 58°, find ∠ATQ.

Chapter: [0.031] Circles [0.031] Circles

If A(5, 2), B(2, −2) and C(−2, *t*) are the vertices of a right angled triangle with ∠B = 90°, then find the value of *t*.

Chapter: [0.061] Lines (In Two-dimensions)

Find the ratio in which the point `P(3/4,5/12)` divides the line segment joining the points `A(1/2,3/2)` and B(2,-5)

Chapter: [0.061] Lines (In Two-dimensions)

Solve the following quadratic equation for *x *:

9*x*^{2} − 6*b*^{2}*x* − (*a*^{4} − *b*^{4}) = 0

Chapter: [0.023] Quadratic Equations

In Fig. 3, APB and AQO are semicircles, and AO = OB. If the perimeter of the figure is 40 cm, find the area of the shaded region [Use `pi=22/7`]

Chapter: [0.071] Areas Related to Circles

A solid wooden toy is in the form of a hemisphere surrounded by a cone of same radius. The radius of hemisphere is 3.5 cm and the total wood used in the making of toy is 166 `5/6` cm^{3}. Find the height of the toy. Also, find the cost of painting the hemispherical part of the toy at the rate of Rs 10 per cm^{2 .}[Use`pi=22/7`]

Chapter: [0.07200000000000001] Surface Areas and Volumes

In Fig. 4, from the top of a solid cone of height 12 cm and base radius 6 cm, a cone of height 4 cm is removed by a plane parallel to the base. Find the total surface area of the remaining solid. (Use `pi=22/7` and `sqrt5=2.236`)

Chapter: [0.07200000000000001] Surface Areas and Volumes

In Fig. 5, from a cuboidal solid metallic block, of dimensions 15cm ✕ 10cm ✕ 5cm, a cylindrical hole of diameter 7 cm is drilled out. Find the surface area of the remaining block [Use

`pi=22/7`]

Chapter: [0.07200000000000001] Surface Areas and Volumes

The angle of elevation of the top of a building from the foot of the tower is 30° and the angle of elevation of the top of the tower from the foot of the building is 45°. If the tower is 30 m high, find the height of the building.

Chapter: [0.040999999999999995] Heights and Distances

In Figure, find the area of the shaded region [Use π = 3.14]

Chapter: [0.071] Areas Related to Circles

Find that non-zero value of *k*, for which the quadratic equation *kx*^{2} + 1 − 2(*k* − 1)*x* + *x*^{2} = 0 has equal roots. Hence find the roots of the equation.

Chapter: [0.023] Quadratic Equations

All red face cards are removed from a pack of playing cards. The remaining cards were well shuffled and then a card is drawn at random from them. Find the probability that the drawn card is

(i) a red card

(ii) a face card

(iii) a card of clubs

Chapter: [0.051] Probability [0.051] Probability

Find the area of the triangle PQR with Q(3,2) and the mid-points of the sides through Q being (2,−1) and (1,2).

Chapter: [0.061] Lines (In Two-dimensions)

If *S*_{n} denotes the sum of first *n* terms of an A.P., prove that *S*_{30} = 3[*S*_{20} − *S*_{10}]

Chapter: [0.022000000000000002] Arithmetic Progressions

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

Chapter: [0.031] Circles

In the given figure, tangents PQ and PR are drawn from an external point P to a circle with centre O, such that ∠RPQ = 30°. A chord RS is drawn parallel to the tangent PQ. Find ∠RQS.

Chapter: [0.031] Circles [0.031] Circles

From a point P on the ground the angle of elevation of the top of a tower is 30° and that of the top of a flag staff fixed on the top of the tower, is 60°. If the length of the flag staff is 5 m, find the height of the tower.

Chapter: [0.040999999999999995] Heights and Distances

Ramkali required Rs 2,500 after 12 weeks to send her daughter to school. She saved Rs 100 in the first week and increased her weekly saving by Rs 20 every week. Find whether she will be able to send her daughter to school after 12 weeks.

What value is generated in the above situation?

Chapter: [0.022000000000000002] Arithmetic Progressions

The numerator of a fraction is 3 less than its denominator. If 2 is added to both the numerator and the denominator, then the sum of the new fraction and original fraction is `29/20`. Find the original fraction.

Chapter: [0.023] Quadratic Equations

Water is flowing at the rate of 2.52 km/h through a cylindrical pipe into a cylindrical tank, the radius of whose base is 40 cm. If the increase in the level of water in the tank, in half an hour is 3.15 m, find the internal diameter of the pipe.

Chapter: [0.07200000000000001] Surface Areas and Volumes [0.07200000000000001] Surface Areas and Volumes

If A(−4, 8), B(−3, −4), C(0, −5) and D(5, 6) are the vertices of a quadrilateral ABCD, find its area.

Chapter: [0.061] Lines (In Two-dimensions)

A 21 m deep well with diameter 6 m is dug and the earth from digging is evenly spread to form a platform 27 m ✕ 11 m. Find the height of the platform.[Use `pi=22/7`]

Chapter: [0.040999999999999995] Heights and Distances

A bag contains 25 cards numbered from 1 to 25. A card is drawn at random from the bag. Find the probability that the number on the drawn card is:

(i) divisible by 3 or 5

(ii) a perfect square number

Chapter: [0.051] Probability [0.051] Probability

Draw a line segment AB of length 7 cm. Taking A as centre, draw a circle of radius 3 cm and taking B as centre, draw another circle of radius 2 cm. Construct tangents to each circle from the centre of the other circle.Steps

Chapter: [0.033] Constructions

Solve for *x* :

`3/(x+1)+4/(x-1)=29/(4x-1);x!=1,-1,1/4`

Chapter: [0.023] Quadratic Equations

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