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 =