# A tap can fill a tank in 30 minutes, another tap can fill it in 1.5 hours..........At what time will the tank be filled?

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A tap can fill a tank in 30 minutes, another tap can fill it in 1.5 hours.
If both the taps are opened at 11.40 am.
At what time will the tank be filled?

posted Jun 18, 2019

First tap can fill 1/30 of tank in 1 min
Second tap can fill 1/90 of tank in 1 min
Both taps can fill 1/30+1/90=2/45 of the tank or it will take 1/2/45=24.5 min to fill the tank
Tank will be full at 11:40 am+00:24.5=12:04.5 PM

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