Alan is thrice as good a workman as bob and so he takes 60 days less than bob for doing a job. find the time in which they can do it together.
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the efficiency of Alan and Bob in the ratio = 3:1
So the ratio of time taken to do the work = 1:3
the difference in ratio is 2 which means 60 days.
2 = 60 days
1 = 30 days.
3 = 90 days.
So Alan will take 30 days and Bob will take 90 days.
together they will take 45/2 days answer.
So the ratio of time taken to do the work = 1:3
the difference in ratio is 2 which means 60 days.
2 = 60 days
1 = 30 days.
3 = 90 days.
So Alan will take 30 days and Bob will take 90 days.
together they will take 45/2 days answer.
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