SOLUTION: A pool can be filled by one pipe in 9 hours and by a second pipe in 7 hours. How long will it take using both pipes to fill the pool?
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Question 846838: A pool can be filled by one pipe in 9 hours and by a second pipe in 7 hours. How long will it take using both pipes to fill the pool? Answer by josgarithmetic(39613) (Show Source):
You can put this solution on YOUR website! The fill rate of both pipes together is the sum of their individual fill rates. The rates must be used as "pool-fulls per hour".
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