Use some thinking to answer the following question. A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in ------- days?\nOptions:\n(A) 22 1/8\n(B) 22 1/2\n(C) 22 1/1\n(D) 22 1/5\n(E) 22 1/9
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1/18 + 1/30 = 8/90 = 4/45\n45/4 = 11 ¼ *2 = 22 1/2 days So the final answer is (B).
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