Mathematics, 15.04.2021 16:50 ash2905

After a flood, a city fire department uses res pumps to drain water from flooded basements. All three pumps can drain all the water a flooded basement in 6 hours, 5 hours and 4 hours, respectively. If the turn on simultaneously, how long does it take to empty the basement

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After a flood, a city fire department uses res pumps to drain water from flooded basements. All thre...

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