Question

5. 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

8 ft.

Explanation:

V = Bh B = area of the base h = height

The base is a circle, so
`B = \pi r^(2)`

320π =
`\pi r^(2) (20) = 20\pi r^(2)`

`r^(2) = (320\pi )/(20\pi ) = 16`

r = 4

d = 8 ft.