Question

A cold water faucet can fill the bathtub in 12 minutes, and a hot water faucet can fill the bathtub in 18 minutes. The drain can empty the bathtub in 24 minutes. If both faucets are on and the drain is open, how long would it take to fill the bathtub?

The answer is not 10.3, I dunno why

Answer 1

Add 12+18=30 divide it by 2 because your putting them in the same tub make sure 15 minutes to fill the hot tub.