Time & Work · Question 17 · Easy
9 labourers can dig a trench in 20 days. How many labourers are needed to dig the same trench in 12 days?
- 18 labourers
- 14 labourers
- 15 labourers
- 12 labourers
Answer and explanation
Answer: C. 15 labourers
Explanation: Total work = 9 × 20 = 180 labourer-days. To finish in 12 days, 180 ÷ 12 = 15 labourers are needed.
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