Answer : 4 30 min Explanation : Answer: D) 30 min Explanation: Part filled by (A B) in 1 minute = (1/60 1/40) = 1/24Suppose the tank is filled in x minutes.Then, x/2(1/24 1/40) = 1(x/2) * (1/15) = 1 =

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A large tanker can be filled by two pipes A and B in 60 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 ?