SOLUTION: An inlet pipe on a swimming pool can be used to fill the pool in 38 hours. The drain pipe can be used to empty the pool in 39 hours. If the pool is 2/3 filled and then the inlet pi

Algebra ->  Rate-of-work-word-problems -> SOLUTION: An inlet pipe on a swimming pool can be used to fill the pool in 38 hours. The drain pipe can be used to empty the pool in 39 hours. If the pool is 2/3 filled and then the inlet pi      Log On


   

Question 923059: An inlet pipe on a swimming pool can be used to fill the pool in 38 hours. The drain pipe can be used to empty the pool in 39 hours. If the pool is 2/3 filled and then the inlet pipe and drain pipe are opened, how long from that time will it take to fill the pool?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
The job to be done is 1%2F3, "FILL THE POOL" units.

Without the descriptive discussion,....
%281%2F38-1%2F39%29t=1%2F3
Using t for how many hours to fill the partially filled pool.