Question

A fish tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320 pi cubic feet. What is the radius, in feet, of the fish tank?

A. 16
B. 10
C. 8
D. 4

Answer 1

4 feet

Explanation:

From the question, we are given;

• Height of the cylinder as 20 ft
• Volume of the cylinder as 320 pi

We are required to find the radius of the cylinder fish tank;

• We need to know that the volume of a cylinder is given by;

Volume = pi × r² × h

Rearranging the formula;

r² = V ÷ pi × h

Therefore;

r² = 320 pi ÷ (pi × 20 ft)

= 16

Thus;

r = √16

= 4 ft

Therefore, the radius of the fish tank is 4 feet.