12 men can do a piece of work in 30 days. How many extra men should be engaged to do the work in 20 days? - Quantitative Aptitude MCQ Competitive Exams 2026 | ExamTest.live | ExamTest.live

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12 men can do a piece of work in 30 days. How many extra men should be engaged to do the work in 20 days?

A $8 men$
B $6 men$
C $10 men$
D $15 men$

Solution & Step-by-step Explanation

Using the chain rule formula M_{1} D_{1} = M_{2} D_{2} : * M_{1} = 12 men * D_{1} = 30 days * D_{2} = 20 days * M_{2} = total men required for 20 days 12 \times 30 = M_{2} \times 20 M_{2} = \frac{360}{20} = 18 men Extra men required = M_{2} - M_{1} = 18 - 12 = 6 men

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12 men can do a piece of work in 30 days. How many extra men should be engaged to do the work in 20 days?

A

8 men

B

6 men

C

10 men

D

15 men

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