Mathematics, 22.09.2019 13:50 heyperdomo8496

Your pump empties the water from a swimming pool in 6 hours. when your friend's pump is used together with your pump, the pool is emptied in 1.5 hours. how long (in hours) does it take your friend's pump to empty the pool when working alone? hour(s)

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Your pump empties the water from a swimming pool in 6 hours. when your friend's pump is used togethe...