Two pipes A and B can fill a tank in 18 minutes and 24 minutes respect – McqOptions

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1.	Two pipes A and B can fill a tank in 18 minutes and 24 minutes respectively. If both the pipes are opened simultaneously, then after how much time should pipe B be closed so that the tank is full in 12 minutes?
A.	6 minutes
B.	9 minutes
C.	8 minutes
D.	5 minutes
Answer» D. 5 minutes

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