if 5 men take an hour to dig a ditch, how long should it take 12 men to dig same type of ditch?
5 men = 1 hour to dig a ditch
12 men =? hours to dig a ditch
=5/12 hours.
11 men can dig 634 m long trench in one day. How many men should be employed for digging 27 m long trench of the same type in one day ?