1) Tap A can fill a cistern (tank) in 1 hour30 minutes and Tap B can f – InterviewSolution

1.	1) Tap A can fill a cistern (tank) in 1 hour30 minutes and Tap B can fill it in 1 hourIn how many minutes will the cistern befilled up, if both the taps are opened at atime?
Answer» If both taps are openedthen the tank will be filled in1/90+1/60( water filled in one minute by both the tap)=2+3/1805/180= 180/5 minutes36 minutes

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