Give a quick stream of consciousness before answering the following question. Pipes A and B can fill a cistern in 8 and 24 minutes respectively. They are opened an alternate minutes. Find how many minutes, the cistern shall be full?\nOptions:\n(A) 22\n(B) 12\n(C) 88\n(D) 99\n(E) 27
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1/8 + 1/24 = 1/6\n6 * 2 = 12
The answer: (B).
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