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?
Select the correct option.
A) 15/2	B) 14/2	C) 15/4	D) 14/4	E) 13/4
Let the total units of work done be 60.   Units of work done by A in one day = 5.   Given, B is 60% more efficient than A.   Thus, B will be able to finish 8 units of work in a day.   Therefore, time taken by B alone to complete the total work = 60/8 =15/2 days.   15/2NSWER:15/2
<result>A</result>
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?