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

Answer 1

V = π r^2 h
320π = π(r^2)(20)
r^2 = 320π/(20π) = 16
r = 4

so the diameter is 8

Answer 2

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