Civil Service Exam Reviewer · Ratio and Proportion · medium
12 workers can finish a job in 25 days. Working at the same rate, how many days will 3 workers take?
- 6.25 days
- 34 days
- 100 days
- 101 days
Answer
C. 100 days
Solution
Total work = 12 × 25 = 300 worker-days. Days = 300 ÷ 3 = 100. (Inverse proportion.)
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