Pipes and Cistern Question & Answers
Three taps A,B and C can fill a tank in 12,15 and 20 hours respectively. If A is open all the time and B ,C are open for one hour each alternatively, the tank will be full in:
|A) 6 hrs||B) 20/3 hrs|
|C) 7 hrs||D) 15/2 hrs|
Now, it is the turn of A and B (3/20) part is filled by A and B in 1 hour.
therefore, Total time taken to fill the tank =(6+1)hrs= 7 hrs
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