Three taps A,B,C can fill a tank in 12 , 15 and 20 hours respectively. – McqOptions

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1.	Three taps A,B,C can fill a tank in 12 , 15 and 20 hours respectively. if A is open all the time and B and C are open for one hour each alternatively, the tank will be full in _____________
A.	5 HRS
B.	6 HRS
C.	7 HRS
D.	20/3 HRS
Answer» D. 20/3 HRS

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