# A solid consists of a cone on top of a cylinder with a radius equal to that of the cone. The height of the cone is #12 # and the height of the cylinder is #18 #. If the volume of the solid is #72 pi#, what is the area of the base of the cylinder?

##### 1 Answer

Sep 7, 2016

The area of the base is

#### Explanation:

Start by drawing a diagram.

The formula for volume of a cone is

Let

The formula for area of a circle is

Hopefully this helps!