Find the volume of a right circular cone that has a height of 12.4 in and a base with a diameter of 15.6 in. Round your answer to the nearest tenth of a cubic inch.

Question

I really do not get how you can use train tracks to find the volume of a shape,and i also do not get how you use pie in the equation. Thanks for the help!

Answer 1

For a right circular cylinder:

Volume = Area of the Base × Height

The Height is given as 12.4 inches. The area of the circular base is:

Area of Base = π·r²

where r is the radius, which is half of the given diameter (15.6 inches). Use you calculator to compute the area of the base then the volume. The units are inches³.