1.

A and B can do a piece of work in 6 days and 4 days respectively. ′A′ started the work; worked at it for 2 days and then was joined by B. Find the total time taken to complete the work.

Answer»

A and B can do a piece of work in 6 days and 4 days respectively. A started the work; worked at it for 2 days and then was joined by B. Find the total time taken to complete the work.



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