Question

A cylindrical oil drum has a diameter of 2 feet and a height of 3 feet what is the volume of the oil drum?

Answer 1

We know, Volume of a Cylinder = πr²h

Here, r = 2/2 = 1 ft
h = 3 ft

Substitute their values, 
v = 3.14 * (1)² * 3
v = 9.42 ft³

In short, Your Answer would be: 9.42 Ft³

Hope this helps!