The volume of sphere with diameter 1 cm is …….. cm³.

A fez, the headgear cap used by the trucks is shaped like the frustum of a cone. If its radius on the open side is 12 cm and radius at the upper base is 5 cm and its slant height is 15 cm, find the area of material used for making it. (π = 3.14)

A bucket is in the form of a frustum of a cone with capacity of 12308.8 cm³ of water. The radii of the top and bottom circular ends are 20 cm and 12 cm respectively. Find the height of bucket and the cost of making it at the rate of Rs. 10 per cm².

The volume of hemisphere with radius 1.2 cm is ……….. cm³.

The volume of sphere is in 4/3 π cm³. Then its diameter is ………. cm.