Civil Service Exam Reviewer · Ratio and Proportion · hard
7 workers can complete a job in 28 days. After working for 18 days, 5 workers leave. How many more days will the remaining workers need to finish the job?
- 10 days
- 80 days
- 53 days
- 35 days
Answer
D. 35 days
Solution
Total = 196 worker-days. Done in 18 days: 126. Remaining: 70. With 2 workers: 70 ÷ 2 = 35 days.
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