Civil Service Exam Reviewer · Ratio and Proportion · hard
14 workers can complete a job in 30 days. After working for 25 days, 4 workers leave. How many more days will the remaining workers need to finish the job?
- 5 days
- 7 days
- 17 days
- 32 days
Answer
B. 7 days
Solution
Total = 420 worker-days. Done in 25 days: 350. Remaining: 70. With 10 workers: 70 ÷ 10 = 7 days.
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