2013-2014 March

Two different coins are tossed simultaneously. The probability of getting at least one head is

(A)`1/2`

(B)`1/8`

(C)`3/4`

(D)`7/8`

Chapter: [5.01] Probability

A bag contains cards numbered from 1 to 25. A card is drawn at random from the bag. The probability that the number on this card is divisible by both 2 and 3 is

(A)`1/5`

(B)`3/25`

(C)`4/25`

(D)`2/25`

Chapter: [5.01] Probability

If the height of a vertical pole is 3–√3 times the length of its shadow on the ground, then the angle of elevation of the Sun at that time is

(A) 30°

(B) 60°

(C) 45°

(D) 75°

Chapter: [4.01] Heights and Distances

The perimeter of a triangle with vertices (0, 4), (0, 0) and (3, 0) is

(A)\[7 + \sqrt{5}\]

(B) 5

(C) 10

(D) 12

Chapter: [3.02] Triangles

A rectangular sheet of paper 40 cm × 22 cm, is rolled to form a hollow cylinder of height 40 cm. The radius of the cylinder (in cm) is

3.5

7

\[\frac{80}{7}\]

5

Chapter: [7.02] Surface Areas and Volumes

In Figure 1, a quadrilateral ABCD is drawn to circumscribe a circle such that its sides AB, BC, CD and AD touch the circle at P, Q, R and S respectively. If AB = *x* cm, BC = 7 cm, CR = 3 cm and AS = 5 cm, find *x*.

(A) 10

(B) 9

(C) 8

(D) 7

Chapter: [3.01] Circles

The next term of the A.P.\[\sqrt{7}, \sqrt{28}, \sqrt{63},\]

(A)\[\sqrt{70}\]

(B)\[\sqrt{84}\]

(C)\[\sqrt{97}\]

(D)\[\sqrt{112}\]

Chapter: [2.02] Arithmetic Progressions

Two concentric circles are of radii 5 cm and 3 cm. Length of the chord of the larger circle, (in cm), which touches the smaller circle is

(A) 4

(B) 5

(C) 8

(D) 10

Chapter: [3.01] Circles

In Figure 2, XP and XQ are two tangents to the circle with centre O, drawn from an external point X. ARB is another tangent, touching the circle at R. Prove that XA + AR = XB + BR ?

Chapter: [3.01] Circles

In Figure 3, OABC is a quadrant of a circle of radius 7 cm. If OD = 4 cm, find the area of the shaded region ?\[[Use\pi = \frac{22}{7}]\]

Chapter: [7.02] Surface Areas and Volumes

Solve for *x*:

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

Two different dice are rolled simultaneously. Find the probability that the sum of numbers appearing on the two dice is 10 ?

Chapter: [5.01] Probability

Prove that the tangents drawn at the ends of a diameter of a circle are parallel.

Chapter: [3.01] Circles

The sum of the first *n* terms of an A.P. is 4*n*^{2} + 2*n*. Find the *n*^{th} term of this A.P ?

Chapter: [2.02] Arithmetic Progressions

In Figure 4, from a rectangular region ABCD with AB = 20 cm, a right triangle AED with AE = 9 cm and DE = 12 cm, is cut off. On the other end, taking BC as diameter, a semicircle is added on outside the region. Find the area of the shaded region.\[[Use\pi = 3 . 14]\]

Chapter: [7.02] Surface Areas and Volumes

In Figure 5, ABCD is a quadrant of a circle of radius 28 cm and a semi circle BEC is drawn with BC as diameter. Find the area of the shaded region ?\[[Use\pi = \frac{22}{7}]\]

Chapter: [7.01] Areas Related to Circles

Points P, Q, R and S divide the line segment joining the points A(1,2) and B(6,7) in five equal parts. Find the coordinates of the points P,Q and R

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

The sum of the first 7 terms of an A.P. is 63 and the sum of its next 7 terms is 161. Find the 28^{th} term of this A.P ?

Chapter: [2.02] Arithmetic Progressions

A 5 m wide cloth is used to make a conical tent of base diameter 14 m and height 24 m. Find the cost of cloth used at the rate of Rs 25 per metre ?\[[Use \pi = \frac{22}{7}]\]

Chapter: [7.02] Surface Areas and Volumes

A girl empties a cylindrical bucket, full of sand, of base radius 18 cm and height 32 cm, on the floor to form a conical heap of sand. If the height of this conical heap is 24 cm, then find its slant height correct upto one place of decimal?

Chapter: [7.02] Surface Areas and Volumes

Two ships are approaching a light-house from opposite directions. The angles of depression of the two ships from the top of the light-house are 30° and 45°. If the distance between the two ships is 100 m, find the height of the light-house. \[[Use \sqrt{3} = 1 . 732]\]

Chapter: [4.01] Heights and Distances

If 1 is a root of the quadratic equation 3x^{2} + ax – 2 = 0 and the quadratic equation a(x^{2} + 6x) – b = 0 has equal roots, find the value of b ?

Chapter: [2.03] Quadratic Equations

Draw a pair of tangents to a circle of radius 5 cm which are inclined to each other an angle of 60º.

Chapter: [3.03] Constructions

Find the value(s) of *p* for which the points (3*p* + 1, *p*), (*p* + 2, *p* – 5) and (*p* + 1, –*p*) are collinear ?

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

The angle of elevation of the top of a chimney form the foot of a tower is 60° and the angle of depression of the foot of the chimney from the top of the tower is 30° . If the height of the tower is 40 meters. Find the height of the chimney.

Chapter: [4.01] Heights and Distances

A quadrilateral is drawn to circumscribe a circle. Prove that the sums of opposite sides are equal ?

Chapter: [3.01] Circles

The midpoint P of the line segment joining points A(-10, 4) and B(-2, 0) lies on the line segment joining the points C(-9, -4) and D(-4, y). Find the ratio in which P divides CD. Also, find the value of y.

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

A hemispherical depression is cut out from one face of a cubical block of side 7 cm, such that the diameter of the hemisphere is equal to the edge of the cube. Find the surface area of the remaining solid. [Use *π *= \[\frac{22}{7}\]]

Chapter: [7.02] Surface Areas and Volumes

If S* _{n}* denotes the sum of the first

*n*terms of an A.P., prove that S

_{30}= 3 (S

_{20}− S

_{10}) ?

Chapter: [2.02] Arithmetic Progressions

A metallic bucket, open at the top, of height 24 cm is in the form of the frustum of a cone, the radii of whose lower and upper circular ends are 7 cm and 14 cm respectively. Find :

(i) the volume of water which can completely fill the bucket.

(ii) the area of the metal sheet used to make the bucket.

[Use *π *=\[\frac{22}{7}\]

Chapter: [7.02] Surface Areas and Volumes

The sum of the squares of two consecutive multiples of 7 is 637. Find the multiples ?

Chapter: [2.03] Quadratic Equations

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

Chapter: [3.01] Circles

A piggy bank contains hundred 50 p coins, fifty Rs 1 coins, twenty Rs 2 coins and ten Rs 5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, what is the probability that the coin

(i) Will be a 50 p coin?

(ii) Will not be a Rs.5 coin?

Chapter: [5.01] Probability

Solve for x:

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

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