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) 12 min\n(B) 6 min\n(C) 4 min\n(D) 8 min\n(E) 10 min Now, let's think a bit. Some random thoughts:
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1/8 + 1/24 = 1/6\n6 * 2 = 12
The final answer: (A).
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