### Home > GC > Chapter 12 > Lesson 12.1.2 > Problem 12-20

12-20.

Find the volume of a cone if the circumference of the base is

The formula for the circumference of a circle is

Find the radius of the base.

Find the area of the base.

Base

Find the volume.

The formula for the volume of a cone is

The equation for the lateral surface area of a cone is