Quantitative Aptitude :: Pipes & Cistern - Discussion
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Choose the correct option.
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:
A6 hrs
B20/3 hrs
C7 hrs
D15/2 hrs
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