A bathtub can be filled by a cold water pipe in 20min and by a hot water pipe in 30min.A person leaves bathrum after turning on both pipes simultaneously and returns at the moment when the bath tub should be full
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cold water pipe filled in 20 min
in one min cold water pipe filled is =1/20
hot water pipe filled in 30min(
in one min hot water pipe filled in =1/30
both tap open simultaneously and filled in =1/20+1/30
=(3+2)/60
=5/60
=1/12
both filled the tub in 12 hours
hope you got it
in one min cold water pipe filled is =1/20
hot water pipe filled in 30min(
in one min hot water pipe filled in =1/30
both tap open simultaneously and filled in =1/20+1/30
=(3+2)/60
=5/60
=1/12
both filled the tub in 12 hours
hope you got it
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