In a hollow cylinder, the sum of the external and internal radii is 14 cm and the width is 4 cm. If its height is 20 cm, the volume of the material in it is

Two diameter of the base of a cylinder is 4 cm and its height is 20 cm . The volume of the cylinder is

A solid sphere of radius 6 cm is melted into a hollow cylinder of uniform thickness. If the external radius of the base of the cylinder is 5 cm and its height is 32 cm, then find the thickness of the cylinder.

If the external and internal radii of a hollow sphere be 6 cm and 3 cm respectively, then the volume (i.e, the material) of the sphere will be

The radius of a cylinder is 14cm and height is 20 cm. then- Find the volume.

The height of a cylnder is 14 cm and its diameter is 10 cm. The volume of the cylinder is

The radius of the base of a cylinder is 14 cm and height is 6 cm. The volume of the cylinder is :

A solid sphere of radius 6 cm is melted into a hollow cylinder of uniform thickness. If the external radius of the base of the cylinder is 5 cm and its height is 32 cm, find the uniform thickness of the cylinder.

The diameter of the base of a cylinder is 6 cm and its height is 14 cm. The volume of the cylinder is

A solid sphere of radius ' r ' is melted and recast into a hollow cylinder of uniform thickness. If the external radius of the base of the cylinder is 4 cm, its height 24 cm and thickness 2 cm, find the value of ' r ' .