Civil Service Exam Reviewer · Ratio and Proportion · medium
3 workers can finish a job in 10 days. Working at the same rate, how many days will 5 workers take?
- 16.67 days
- 6 days
- 8 days
- 7 days
Answer
B. 6 days
Solution
Total work = 3 × 10 = 30 worker-days. Days = 30 ÷ 5 = 6. (Inverse proportion.)
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