Two pipes A and B can fill a tank with water in 30 minutes and 45 minu – McqOptions

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1.	Two pipes A and B can fill a tank with water in 30 minutes and 45 minutes respectively. The water pipe C can empty the tank in 36 minutes. First A and B are opened. After 12 minutes C is opened. Total time (in minutes) in which the tank will be filled up is:-
A.	36
B.	30
C.	12
D.	24
Answer» E.

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