SOLUTION: A pump can fill a swimming pool in 8 hours. The pool also has a drain that can empty the pool in 10 hours. If someone turns on the pump to fill the pool, but forgets to shut the dr

Algebra ->  Rate-of-work-word-problems -> SOLUTION: A pump can fill a swimming pool in 8 hours. The pool also has a drain that can empty the pool in 10 hours. If someone turns on the pump to fill the pool, but forgets to shut the dr      Log On


   



Question 385973: A pump can fill a swimming pool in 8 hours. The pool also has a drain that can empty the pool in 10 hours. If someone turns on the pump to fill the pool, but forgets to shut the drain, how long would it take for the pool to fill?

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
in the 8 hr that it takes the pump to fill the pool , the drain empties 8/10 or 4/5
so 1/5 of the pool is filled in 8 hr

how long to fill 5/5 (the whole pool)?