If 36 farmers can do a piece of work in 24 hours, In how many hours will 18 farmers do it?

2 women and 3 men can do a piece of work in 10 days while 3 women and 2 men can do the same work in 8 days. In how many days can 2 women and 1 man do the work?

A tyre has two punctures. The first puncture alone would have made the tyre flat in 6 minutes and the second alone would have done it in 9 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat?

P alone can do a piece of work in 5 days and Q alone in 4 days. P and Q undertook to do it for Rs. 3000. With the help of R they completed the work in 2 days. How much is to be paid to R?

P can complete a work in 20 days while Q is 25% more effiecent than P. Q worked for 6 days and left, remaining work is completed by R in 15 days. Find in how many days R can complete the whole work alone?

8 men and 3 boys together can complete a piece of work in 5 days. If 5 boys can complete the same piece of work in 15 days, in how many days do 5 men complete the same piece of work?

Three men can complete a work in 6 days and 5 women can complete the same work in 18 days. In how many days can 4 men and 10 women together complete the same work ?