A can do a piece of work in 10 days, B can do it in 15 days working together they can finish the work in :

A can do a piece of work in 5 days, B can do it in 10 days. With the help of C, they finish the work in 2 days. In how many days C alone can do the whole work?

A can do a piece of work in 10 days and B in 15 days. How long will they take to finish it working together ?

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

A can do a piece of work in 4 days and B can do it in 12 days. In how many days will they finish the work, both working together ?

A can do a piece of work in 20 days and B in 15 days. With help of C, they finish the work in 5 days. C can alone do the work in

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