AFCAT II 2017 Solved Paper

Ratio of times by A and B=1:3
The time difference is (3 – 1) = 2 days while B takes 3 days and A takes 1 day.
If difference of time is 2 days, B takes 3 days
If difference of time is 40 days, B takes (

3

2

×40)=60 days
So, A takes 20 days to do the work.
A's 1 day's work =

1

20

B's 1 day's work =

1

60

=

4

60

  =

1

15

∴ A and B together can do the work in 15 days