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?
15/2days
12/7days
14/9days
None of these
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.