A contractor undertakes to dig a canal,6 kilometre long, in 35 days and employed90 men. He finds that after 20 days only 2 kmof canal have been dug. How many more menmust he employ to finish the work in time?

A contractor undertakes to dig a canal,6 kilometre long, in 35 days an

1.	A contractor undertakes to dig a canal,6 kilometre long, in 35 days and employed90 men. He finds that after 20 days only 2 kmof canal have been dug. How many more menmust he employ to finish the work in time?
Answer» 90 men can dig a canal of length 2000 m in 20 days.⇒ Work capacity of 1 man =2000 m/ (20 days × 90 men)= 10/9 meter per day per manRemaining length of the canal = 6000 - 2000 = 4000 mNumber of days remaining = 35 - 20 = 15 daysWork done by one man in 15 days = 10/9 × 15= 50/3metersNumber of men required to complete the work in 15 days= (Remaining length of the canal) / (Work capacity of 1man) =4000 / (50/3) = 240menAddition men required to complete the work = 240 – 90 = 150 men.