A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job ?\nOptions:\n(A) 19\n(B) 15\n(C) 16\n(D) 17\n(E) 18 Now, let's think a bit. Some random thoughts:
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Ratio of time taken by A & B = 160:100 = 8:5 Suppose B alone takes x days to do the job. Then, 8:5::12:x = > 8x = 5*12 = > x = 15 days.
The final answer: (B).
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