SOLUTION: It takes an older pump 4 times as long to drain a certain pool as it does a newer pump. Working together it takes the two pumps 4 hours to drain the pool. How long will it take the
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Question 1147442: It takes an older pump 4 times as long to drain a certain pool as it does a newer pump. Working together it takes the two pumps 4 hours to drain the pool. How long will it take the older pump to drain the pool working alone?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
new pump time, x
old pump time, 4x
both together 4
hours of time for old pump by itself
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