## S-2-30 During the medical check-up of 35 students of a class, their

During the medical check-up of 35 students of a class, their weights were recorded as follows- Ans : 30. By locating upper limits on X axis and number of students on Y axis, we get the following graph Class Intervals Frequency Read More …

## S-2-29 A right triangle having sides 15cm and 20cm

A right triangle having sides 15cm and 20cm is made to revolve about its hypotenuse. Find the volume and Surface Area of the double cone so formed. (Use p =3.14) Ans :

## S-2-28 The angle of elevation of an aeroplane from a point A on

The angle of elevation of an aeroplane from a point A on the ground is 600. After a flight of 30 seconds, the angle of elevation changes to 300. If the plane is flying at a constant height of 3600√3 m, find Read More …

## S-2-27 In the adjoining figure four equal circles are described

In the adjoining figure four equal circles are described at the four corners of a square so that each touches two of the others. The shaded area enclosed between the circles is 24/7 cm2. Find the radius of each circle. Ans : Read More …

## S-2-25 Draw a pair of tangents to a circle of radius 4 cm,

Draw a pair of tangents to a circle of radius 4 cm, which are inclined to each other at an angle of 60°. Or Construct a tangent to a circle of radius 2 cm from a point on the concentric circle Read More …

## S-2-26 Prove that tanθ/1−cotθ + cotθ/1−tanθ = 1 + secθ.cosecθ

Prove that tanθ/1−cotθ + cotθ/1−tanθ = 1 + secθ.cosecθ Ans :

## S-2-24 A contract on construction job specifies a penalty for

A contract on construction job specifies a penalty for delay of completion beyond a certain date as follows: Rs. 200 for the first day, Rs. 250 for the second day, Rs.300 for the third day, etc., the penalty for each succeeding day Read More …

## S-2-23  A two-digit number is such that the product

A two-digit number is such that the product of its digits is 12. When 36 is added to this number, the digits interchange their places. Find the number. Or Solve for x, y: x+y-8/2 = x+2y-14/3 = 3x+y+12/11 Ans : Let Two Read More …

## S-2-22 The king, queen and jack of clubs are removed from

The king, queen and jack of clubs are removed from a deck of 52 playing cards. The remaining cards are well shuffled and one card is drawn at random from it. Find the probability of getting the selected card as (i)a heart Read More …

## S-2-21 Two different dice are thrown together.

Two different dice are thrown together. Write all the possible outcomes. Find the probability that the product of the numbers appearing on the top of the dice is less than 9. Or Anil bags contain 5 red marbles, 8 white marbles Read More …

## S-2-20 Find the value of \$ cos 20°/ sin 70° + cos 70° / sin 20°

Find the value of \$ cos 20°/ sin 70° + cos 70° / sin 20° = 8 sin230°\$ Ans :

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