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UPSC Civil ServicesPrelims2024General Studies Paper II (CSAT)
Question
QQ8. X, Y and Z can complete a piece of work individually in 6 hours, 8 hours and 8 hours respectively. However, only one person at a time can work in each hour and nobody can work for two consecutive hours. All are engaged to finish the work. What is the minimum amount of time that they will take to finish the work?
Options
- A 6 hours 15 minutes
- B 6 hours 30 minutes
- C 6 hours 45 minutes
- D 7 hours
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Correct Answer
C 6 hours 45 minutes
Model Answer
Answer: option C, as per UPSC's final answer key (Series A).