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Mathematics, 07.06.2021 16:00 baseballdude4807
Your pump empties the water from a swimming pool in 4 hours. When your friend's pump is used together with your pump, the pool is emptied in 48 minutes. How long (in hours) does it take your friend's pump to empty the pool when working alone?
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Your pump empties the water from a swimming pool in 4 hours. When your friend's pump is used togethe...
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