If Ramesh can complete 2/5th of a work in 24 days and Satish can complete 1/3rd of the work in 30 days, then in how many days can they complete the work if they work together?

U, V and W together can complete a work in 10 days. If U alone can complete the work in 20 days and V alone can complete the work in 30 days, then in how many days W alone can complete the work?

C alone can complete a work in 20 days and D alone can complete the same workin 30 days. In how many days C and D together can complete the same work?

A alone can complete a work in 12 days and B alone can complete the same work in 24 days. In how many days can A and B together complete the same work?

X, Y and Z together can complete a work in 20 days. Y and Z can complete the same work in 30 days. In how many days X alone can complete the same work?

Both X and Y together can complete a work in 12 days and Y alone can complete the same work in 30 days. In how many days will X alone complete the work?

A can do a work in x days while B can do the same work in y days then in how many days will they complete the work, working together?

P and Q together can complete a work in 20 days. If P alone can complete the same work in 36 days, then in how many days Q alone can complete the same work?