A can do a work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?
Select the correct option:
A) 15/2  B) 10  C) 7/2  D) 12  E) 6
Ratio of times taken by 15/2 and B = 160:100 = 8:5   suppose B alone to take x days to do the work   then, 8:5::12:x   8x= 5*12   x=15/2 days   correct option is 15/2
<result>A</result>
A can do a work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?