# 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 #21 # and the height of the cylinder is #7 #. If the volume of the solid is #42 pi#, what is the area of the base of the cylinder?

##### 1 Answer

Jun 27, 2016

#### Explanation:

Assume the radius of the cylinder/cone as r, height of cone as

Volume of the cone part of solid =

Volume of the cylinder part of solid =

What we have is:

Area of the base of the cylinder =