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Work and Time
If 10 men can do a piece of work in 12 days, the time taken by 12 men to do the same piece of work will be:
Explanation and memory cue
If 10 men take 12 days, the total work is 10 × 12 = 120 man-days. With 12 men, the time taken is 120 ÷ 12 = 10 days. However, the options given are 12, 10, 9, and 8 days. The correct calculation shows 10 days, which corresponds to option B, not C. Rechecking: 10 men × 12 days = 120 man-days; 120 man-days ÷ 12 men = 10 days. So correct answer is B, not C. Therefore, correct_answer should be B.