12 men complete a 2400 sq.m ploughing work in 10 days. How many men are required to complete 3600 sq.m ploughing work in 18 days?
Question and options
12 men complete a 2400 sq.m ploughing work in 10 days. How many men are required to complete 3600 sq.m ploughing work in 18 days?
- 10 men
- 15 men
- 18 men
- 20 men
Answer and explanation
Correct answer: A - 10 men
Work per man-day is constant: 12 x 10 / 2400 = M x 18 / 3600. So M = 12 x 10 x 3600 / (2400 x 18) = 10 men.
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CUSAT CAT LLM
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