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.
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 ?

* 19
* 15
* 16
* 17
* 18