Mathematics, 08.05.2021 01:00 euniceyi56

Working together, two pumps can drain a certain pool in 3 hours. If it takes the older pump 9 hours to drain the pool by itself, how long will it take the newer pump to drain the pool on its own?
Do not do any rounding.

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Working together, two pumps can drain a certain pool in 3 hours. If it takes the older pump 9 hours...