Twenty two men cann complete a piece of work in 17 days. They work for 2 days. How many more men should now be employed so as to complete the work in another 10 days?

Twenty five men can make a certain number of chairs in 80 working hours. They work for 10 hours. How many more men should now be employed so as to complete the work in another 50 working hours?

Fifteen men can complete a piece of work in 10 days, working 8 hours per day. How many persons are required to complete double the work in 25 days, working 6 hours per day ?

Fifteen men can complete a piece of work in 10 days, working 8 hours per day. How many persons are required to complete double the work in 25 days, working 6 hours per day ?

15 men can complete a piece of work in 32 days. How many men can complete the work in 12 days ?