Check this option and go to Q2

I carefully select my answer and start reading the next question.

Question 2

A water tank is in the shape of a right circular cylinder with a height of 20 feet and a
volume of 320π cubic feet. What is the diameter, in feet, of the water tank?

I am given 4 options:

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