A bathtub can be filled by the cold water faucet in 10 minutes and by the hot water faucet in 11 minutes. The drain can empty the tub in 4 minutes. Can the tub be filled if both faucets and the drain are open?
A)No
B)Yes

Question

Quizplus · Accepted Answer

The cold water faucet fills 1/10 of the tub per minute, and the hot water faucet fills 1/11 of the tub per minute. Together, they fill 1/10 + 1/11 = 21/110 of the tub per minute. The drain empties 1/4 of the tub per minute. The net rate is 21/110 - 1/4 = -23/220, meaning the tub will be emptied, not filled.

A Bathtub Can Be Filled by the Cold Water Faucet