Question

What is the radius of a right circular cylinder when the volume is 144π cubic feet and the height is 9 feet

Answer 1

Explanation:

V=πr^2h

r = ?

V = 144π ft^3

h = 9 ft

π(r^2)*9 = 144π divide both sides by π

(r^2)*9 = 144

by solving we find and consider the positive root (the radius can not be a negative number)

r = 4 ft

The radius is 4 feet.