Q14 of 79 Page 245

If the volume of a sphere is cu. cm, then its radius is

Let radius of sphere be r cm

Volume of Sphere

So we can say that

Out of all the four Options,

Correct Option : B

If the radius of a sphere is 2 cm, then the curved surface area of the sphere is equal to

The total surface area of a solid hemisphere of diameter 2 cm is equal to

The surface areas of two spheres are in the ratio of 9 : 25. Then their volumes are in the ratio

The total surface area of a solid hemisphere whose radius is a units, is equal to