The image above is a conical frustum.

To compute the volume of a conical frustum, three essential parameters are needed and this parameters are **radius of the lower base (R),** **radius of the upper base (r)** and **height (h).**

The formula for calculating the volume of a conical frustum:

V = ^{πh(R² + Rr + r²)} ⁄ _{3}

Where;

V = Volume of the conical frustum

R = Radius of the lower base

r = Radius of the upper base

h = Height of the conical frustum

Let’s solve an example;

Find the volume of the conical frustum when the lower base is 5 cm with an upper base of 9 cm and a height of 11 cm.

This implies that;

R = Radius of the lower base = 5 cm

r = Radius of the upper base = 9 cm

h = Height of the conical frustum = 11 cm

V = ^{π(11)((5)² + (5)(9) + (9)²)} ⁄ _{3}

V = ^{(34.557)((25) + (45) + (81))} ⁄ _{3}

V = ^{(34.557)(151)} ⁄ _{3}

V = ^{5218.185} ⁄ _{3}

V = 1739.39

Therefore, the **volume of the conical frustum** is **1739.39 cm ^{3}.**