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

Question

Find the volume of a cone with a base diameter of 6ft and a height of 9ft. Write the exact volume in terms of pie
, and be sure to include the correct unit in your answer.

Answer 1

Johnny,

 

volume = (∏r²h)/3   h=height, r=radius

 

= ∏(3ft)²(9ft)/3    diameter=6 => radius r=6/2=3

 

= 27∏ft³