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?
9/11days
11/7days
15/2days
13/5days
Explanation:
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 = 15/2 days.
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 = 15/2 days.