What is the volume of a hollow cylinder with R, r and h as outer radius, inner radius and height respectively?

Find the lateral surface area of a hollow cylinder of outer radius R, inner radius r and height h.

The volume of a cylinder of radius r and length h is

The lateral surface area of a hollow cylinder of outer radius R, inner radius r and height h is_______.

Volume of a cylinder with radius h and height r is __________.

The volume of a cylinder whose radius r is equal to its height is

What happens to the volume of the cylinder with radius r and height h, when its (a) radius is halved, (b) height is halved.

If the external radius of a hollow cylinder be R units, the internal radius be r units and the height be h units, then the volume of the cylinder is