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Mathematics, 20.11.2019 07:31 aliviafrancois2000
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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