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(Solved): A pool can be filled by one pump in 50 minutes and by another pump in 60 minutes. A third pump can d ...



A pool can be filled by one pump in 50 minutes and by another pump in 60 minutes. A third pump can drain the pool in 75 minutes. If all 3 pumps go into operation at the same time, how long will it take to fill the pool?


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Let t= be the time in minut
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