Question

One pump can fill a swimming pool in 6 hours. A second pipe drains the pool in 9 hours. If the the pool starts empty, what part of the pool will be filled if the first pipe works for 5 hours and the second pipe works for 6 hours.

Answer 1

1/6

Explanation:

5/6=150/180

6/9=120/180

150/180 - 120/180 = 30/180

30/180=1/6