Question

A and B working together can do a piece of work in 6 days, while A can do the same work in 9 days alone.How much time B needs to finish the work​

Answer 1

Answer:

A and B do (1/6)th of the work in a day.

A alone can do (1/9)th of the work in a day.

So B does (1/6)-(1/9) = (6/36)-(4/36) = (2/36) = (1/18)th of the work in a day.

So B will take 18 days to do the work working alone.