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1. 20 men can finish a work in 30 days. After how many days should 5 men leave the work so that the work may be finished in 35 days?
- A. 10
- B. 10
- C. 10
- D. 10
Answer: Option C
Explanation:
20×30=(20×x)+15×(35−x)so, (x−20)+15×(35−x)=600⇒20x+525−15x=600⇒5x=75∴x=15 days
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