If x people working together at the same rate can complete a job in h hours, what part of the same job can one person working alone complete in k hours?

A takes 5 hours more time than that taken by B to complete a work. If working together they can complete a work in 6 hours, then the number of hours that takes to complete the work individually is

A can do a job in 12 days and B can do the same job in 6 days, in how many days working together they can complete the job?

A and B working together can complete a job in 30 days. The ratio of their efficiencies is 3 : 2. In how many days can the faster person complete the job?

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?

P can do a job in 12 days and Q can do the same job in 6 days, in how many days working together they can complete the job?

A can complete a piece of work in 18 days and B can complete the same work in half time taken by A. Then, working together, what part of the same work they can complete in a day?

L alone can complete a work in 200 hours. M alone can complete the same work in 150 hours. L, M and N together can complete the same work in 60 hours. In how many hours can N alone complete the work?