Two pipes A & B can fill the tank in 12 hours and 36 hours respectivel – McqOptions

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1.	Two pipes A & B can fill the tank in 12 hours and 36 hours respectively. If both the pipes are opened simultaneously, how much time will be required to fill the tank?
A.	6 hours
B.	9 hours
C.	12 hours
D.	15 hours
Answer» C. 12 hours

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