Time and Work Questions

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is

20 boys do one fourth of work in 25 days. How many more boys will be required to complete the remaining work in 50 days?

P and Q can do a project in 12 and 12 days respectively. In how many days can they complete 50% of the project if they work together?

A can do 1/3rd of a job in 3 days and B can do half of the job in 9 days. If they work on it together, then in how many days can they finish half of the job?

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

P alone can do a piece of work in 8 days and Q alone can do the same work in 10 days. In how many days will both together complete the same work?

A can do a piece of work in 18 days. He worked at it for 12 days and B finished the remaining work in 8 days. B alone can do the whole work in

A canal of a village can be cleaned by 24 villagers in 12 days. The number of days in which 36 villagers can clean the canal is ?