three pipes are used to fill a pool with water.Individually they can fill the pool in 9 hours, 6 hours and 3 hours.How many minutes will it take to fill the pool if all three pipes are used simultaneously???
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Pool filled in 1 hrs by each are 1/9, 1/6, 1/3
if all three pipes are used simultaneously = 1/9 + 1/6 + 1/3
= 11/18 parts
Time taken = 18/11 hrs
= 1080/11 minutes
hope it help u
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