SOLUTION: A swimming pool can be filled in 6 hours and requires 9 hours to drain. If the DRAIN was accidentally left open for 6 hours while the pool was being filled, how long did filling th

Question 881508: A swimming pool can be filled in 6 hours and requires 9 hours to drain. If the DRAIN was accidentally left open for 6 hours while the pool was being filled, how long did filling the pool require?

Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Six hours filling while the drain is open, and then some t hours of filling with the drain shut.

Use positive for FILLING the pool and NEGATIVE or subtraction for DRAINING the pool.

R*T=J, considering filling the pool to be one job. R is rate, T is time.

Let t be time in hours of filling while the
drain is shut.
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If you understand the analysis explained, and the resulting equation, then THAT is most of the problem solution. Solve for t.
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