A can do a piece of work in `x` days. If new joins B who is twice as efficient as A, then in How many days can both finish double the work.

A can do a piece of work in 15 days. B is 50% more efficient than A, B can finish it in

A can do a piece of work in 10 days while B alone can do it in 15 days . In how many days can both finish the same work?

A and B together can do a piece of work in 12 days, while B alone can finish it in 30 days. In how many days can A alone finish the work?

A can do a piece of work in 8 days, B can do it in 16 days, while C can do it in 80 days. In how many days they can complete the whole work, working together?

(A + B) can do a piece of work in 5 days. If A works with twice of his efficiency and B works with (1)/(3) of his efficiency, then work will be completed in 3 days. In how many days will A do this work alone ?

If A can do a piece of work in p days and B can do the same in q days: A and B together can finish it in how many days