Amar can do a piece of work in 30 days and Raman can do the same work in 15 days. If both work together, then what percent of the total work will be completed in 4 days?

Aman and Raman together can complete a work in 30 days, Raman and Manan can complete the same work in 36 days and Manan and Aman can complete the same work in 45 days. In how many days can all three together complete the work?

Asif is twice as good a workman as Bashir and together they can complete a work in 30 days. In how many days will Asif alone complete the work?

X can finish a work in 25 days. Y can do the same work in 20 days. Together they work for 5 days and then X leaves. In how many days can Y alone complete the remaining work?

A can do a piece of work in 18 days and B in 36 days. If they work together for 9 days, then what percentage of work will be left?

A, B and three men can finish a work in 10, 20 and 15 days respectively, then in how many days will all three together finish the work?

Lal Babu and Mangallu can finish a work in 10 days while Lal Babu alone can finish that work in 15 days, then how many days will Mangallu take to do that work?

A, B and C can do a piece of work in 15 days. B and C can complete the work in 20 days. In how many days can A alone complete the work?