It takes 10 hours to fill a pool with water, and 20 hours to drain it. If the pool is empty and the drain is open, how long would it take to fill the pool?
1 Answer
May 2, 2018
It will take
Explanation:
If it takes
If it takes
If the pool is filling and draining at the same time, then it will only fill by the difference in these amounts.
After
So after
It will therefore take