2018 · Q32
If 5 tractors can plough 5 hectares of land in 5 days, then what is the number of tractors required to plough 100 hectares in 50 days?
Elementary MathematicsTime and Work
- A100
- B20
- C10
- D5
Explanation
Five tractors plough 5 hectares in 5 days, so one tractor ploughs 1 hectare in 5 days (0.2 ha/day). To plough 100 hectares in 50 days needs 2 ha/day, i.e. 2/0.2 = 10 tractors, option (C).