Pipes and Cistern Sample Questions

2. A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half?

A. 30 min

B. 15 min

C. 20 min

D. 27.5 min

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