Mathematics, 05.05.2020 19:45 alinadancer2717
Your pump empties the water from a swimming pool in 8 hours. When your friend's pump is used together with your pump, the pool is emptied in 2 hours and 40 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 8 hours. When your friend's pump is used togethe...
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