Question: Ravi can do a piece of work in 11 days while Prakash can do it in 22 days. In how many days will they finish it together?\nOptions:\n(A) 5 7/3 days\n(B) 7 1/3days\n(C) 5 1/9 days\n(D) 5 7/3 days\n(E) 4 7/9 days Let's think first. Some random reasoning:
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1/11 + 1/22 = 3/22\n22/3 = 7 1/3 days The final answer: (B).
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