## 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 …

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