Time and Work Questions

9 women can complete a work in 50 days. If more 6 women were added to them, how many days before the work can be completed?

A can do a work in 20 days and B in 50 days. If they work on it together for 5 days, then what fraction of work is left?

Mandeep works 3 times as fast as Sampat. If Sampat can complete a job alone in 60 days, then in how many days can they together finish the job?

18 men or 36 boys working 6 hours a day can plough a field in 24 days. In how many days will 24 men and 24 boys working 9 hours a day plough the same field ?

P, Q and R alone can complete a work in 12, 15 and 20 days respectively. In how many days will they together complete the same work?

Manoj can do a piece of work in 42 hours. If he is joined by Jayashree who is 100% more efficient, in what time they will finish the work together?

If 5 person together can make 5 mats in 5 hrs, then 10 person in 10 hours will make

X, Y and Z can do a piece of work in 30,40 and 50 days respectively. All three of them began the work together but Y left 4 days before completion of the work. In how many days was the work completed?