Mathematics, 28.07.2020 01:01, vanna7353

It takes an older pump 3 times as long to drain a certain pool as it does a newer pump. Working together, it takes the two pumps 3 hours to drain the pool. How long will it take the older pump to drain the pool working alone?
Do not do any rounding.

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It takes an older pump 3 times as long to drain a certain pool as it does a newer pump. Working toge...