Civil Service Exam Reviewer · Ratio and Proportion · hard
15 carpenters can finish a job in 17 days. How many MORE carpenters are needed to finish it in 5 days?
- 36
- 51
- 12
- 38
Answer
A. 36
Solution
Work = 15 × 17 = 255 carpenter-days. Needed = 255 ÷ 5 = 51. Additional = 51 − 15 = 36.
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