Ratio of times taken by Rakesh and Vinod = 1 : 3.
The time difference is (3 - 1) 2 days while Vinod take 3 days and Rakesh takes 1 day.
If difference of time is 2 days, vonod takes 3 days.
If difference of time is 40 days, Vinod takes=(3/2)*40=60 days
Answer is 60
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