If 45 men can build a wall of 360 m length in 18 days, then how many men are required to build the same wall of 180 m length in 15 days? - Quantitative Aptitude MCQ Competitive Exam 2026 | ExamTest.live

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If 45 men can build a wall of 360 m length in 18 days, then how many men are required to build the same wall of 180 m length in 15 days?

Solution & Step-by-step Explanation

Using the work equivalence formula (Chain Rule): \frac{M _{1} \times D _{1}}{W _{1}} = \frac{M _{2} \times D _{2}}{W _{2}} Where: M_{1} = 45 men, D_{1} = 18 days, W_{1} = 360 m M_{2} = ?, D_{2} = 15 days, W_{2} = 180 m Substituting the given values into the formula: \frac{45 \times 18}{360} = \frac{M _{2} \times 15}{180} Simplifying the equation: \frac{45 \times 18}{2} = M_{2} \times 15 45 \times 9 = M_{2} \times 15 M_{2} = \frac{45 \times 9}{15} M_{2} = 3 \times 9 = 27 Thus, 27 men are required.

Try it yourself before checking the explanation above.

If 45 men can build a wall of 360 m length in 18 days, then how many men are required to build the same wall of 180 m length in 15 days?

29 men

25 men

21 men

27 men

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