Akbar can do a work in 40 days and Ajay can do it in 60 days Akbar works on the piece of work for some days then Ajay joined him and together they complete the work 10 days earlier than the time Akbar alone would have taken after how many days did Ajay join Akbar?
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Suppose Ajay joins Akbar after d days. This means that on each of those d days, 140 of a piece of work was done, and on each of the remaining 30−d days, 140+160=5120 was done. The total is supposed to be 1. This means that:
140⋅d+5120⋅(30−d)=1.
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