15 men were hired to plough the piece of land in 10 days, how many men were required to do the same job in 3 days?

A) 35 ✓

B) 40

C) 50

D) 30

• No of man-hours required to plough the land= 15 x 10 = 150
• No men required to plough the land in 3- days=150/3= 50.
• So (50–15)= 35- more men are required to plough the land in 3- days.