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Mathematics, 01.07.2019 22:00 juandguardado7045

Pump a can unload a pump in 30hours and pump b can unload in 24 hours because of an approaching storm, both pumps were used. how long did it take to empty the ship?

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Pump a can unload a pump in 30hours and pump b can unload in 24 hours because of an approaching stor...
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