Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in? | MCQ Hive

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Q Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in?

A A. 1 13/17 hours
B B. 2 8/11 hours
C C. 3 9/17 hours
D D. 4 1/2 hours

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