Mathematics, 09.07.2019 17:30 23s40

Pump 1 can empty a pool in 8 hours while pump 2 can empty the same pool in 9 hours. if the two pumps worked together, how long would it take them to empty the pool?

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Pump 1 can empty a pool in 8 hours while pump 2 can empty the same pool in 9 hours. if the two pumps...

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