Help #3 Volume of a cone: Exact answers in terms of pi

Question

Find the volume of a cone with a base radius of 4ft and a height of 9ft. Write the exact volume in terms of pi
, and be sure to include the correct unit in your answer.

Answer 1

Volume of a cone = (πr²h)/3

                          = [π4²(9)]/3

                          = 144π/3

                          = 48π cm³

Answer 2

The formula for the volume of a cone is πr²h / 3, where r is the radius of the base and h is the height.

 

So the volume is π (4²) (9) / 3 = 48 π cm³