Question

An oil tank has to be drained for maintenance. The tank is shaped like a cylinder that is 3.5 ft long with a diameter of 1.8 ft. Suppose oil is drained at a rate of

1.7 n' per minute. If the tank starts completely full, how many minutes will it take to empty the tank?
Use the value 3.14 for at, and round your answer to the nearest minute. Do not round any intermediate computations.

Answer 1

5 minutes

Explanation:

Volume of cylinder = πr²h

Radius, r = diameter / 2 = 1.8 /2 = 0.9

Volume of cylinder = 3.14 * 0.9² * 3.5

Volume = 8.9019 feet³

Drain rate = 1.7 ft per minute

Volume / drain rate

8.9019 / 1.7

= 5.2364117

= 5 minutes (nearest minute)