1.

Pipes A and B are emptying pipes and can empty a tank in 6 hours and 16 hours, respectively. C is a filling pipe. All three pipes were opened together. They took 80 minutes to empty 5/18th of the tank. Pipe C alone can fill the tank in:

A. 36 hours
B. 42 hours
C. 48 hours
D. 40 hours
Answer» D. 40 hours


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