# Frustum of a Right Circular Cylinder

If is the radius and is the height of the frustum, then:

(i) The volume of the frustum of the circular cylinder

i.e.

(ii) The curved surface area of the frustum

(iii) The total surface area = curved surface area + area of the ends

__Example__**:**

A circular cylinder having a radius of 2.3m is cut in the shape of a frustum with . Find the volume and the lateral surface area.

__Solution__**:**

(a)

(b) Curved surface area