If took 12 men 5 hours to build an airstrip. Working at the same rate, how many additional men could have been hired in order for the job to have taken 1 hour less?

If 4 men can reap a field in 5 days working 12 hours a day, in how many days can 10 men reap the same field working 8 hours a day?

24 men can complete a piece of work in 16 days and 18 women can complete the same work in 32 days. 12 men and 6 women work together for 16 days. If the remaining work was to be completed in 2 days, how many additional men would be required besisdes 12 men and 6 women ?

24 men working 8 hours a day can finish a work in 10 days. Working at the rate of 10 hours a day, the number of men required to finish the same work in 6 days is:

If 5 men can build a wall in 12 days, how many men can build it in 10 days?

A contract to be completed in 56 days and 104 men were set towork each working 8 hours a day. After 30 days, 2/5th of the work is completed. How many additional men may be employed so that the work may be completed in time, each man now working 9 hours a day?

10 men working 8 hours day can do a work in 30 days. In how many days will 12 men working 4 hours a day take do the same work?