SOLUTION: Two pipes are used to fill a pool. One pipe can fill the pool in 3 hours while the other pipe can fill the pool in 6 hours. The drain, which can empty the pool in 8 hours, was acci
Question 1139836: Two pipes are used to fill a pool. One pipe can fill the pool in 3 hours while the other pipe can fill the pool in 6 hours. The drain, which can empty the pool in 8 hours, was accidentally left open. How long will it take the pool to fill completely? Answer by ikleyn(52777) (Show Source):