How much time does A take alone to complete the work?
I. B alone takes 45 days, while A and B together take 15 days to complete the work.
II. A and B can do a piece of work in 8 days, and B and C can do the same work in 12 days.
From I, 1/A = 1/15 - 1/45 = 2/45 Therefore, A takes 45/2 = 221/2 days to complete the work. From II, we cannot get the answer. Therefore, data statement I alone is sufficient to answer the question.
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