A certain number of men can do a work in 15 days working 8 hours a days.If the number of men is decreased `(1)/(3)`, then in how many days can twice the previous work be completed by the remaining men working 5 hours per day?

A certain number of men can do a job in 10 days, working 6 hours a day. If the number of men is decreased by (1)/(3)rd , then in how many days can the remaining men complete the work, working 9 hours per day?

A certain number of men can do a job in 10 days, working 6 hours a day. If the number of men is decreased by (1)/(3)rd , then in how many days can the remaining men complete the work, working 9 hours per day?

A certain number of people can complete can complete a piece of work in 12 days working 5 hours a day. If thenumber of men is decreased by half, how many hours a day should they work, so that the work is to be completed in 15 days ?

A certain number of people can complete can complete a piece of work in 12 days working 5 hours a day. If thenumber of men is decreased by half, how many hours a day should they work, so that the work is to be completed in 15 days ?

If 78 men can do a work in 140 days, in how many days will 42 men do the same work ?