Question

The volume of a cone is 62.8 cubic inches. The height of the cone is 15 inches. What is the radius of the cone, rounded to the nearest inch? Use pi = 3.14

2 inches
4 inches
8 inches
9 inches

Answer 1

Answer: 2inches

Explanation:

Answer 2

Recall the formula for volume of a cone: V = (1/3)(base)(height).

Here the volume is V = 62.8 cu in. = (1/3)(pi* r^2)(15 in)

62.8 cu in
or, r^2 = -------------------------- = 4 in^2
(1/3)(3.14)(15 in)

Then the radius of the base is sqrt(4 in^2) = 2 in.