Question 4
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A can finish a job in 20 days and B in 30 days. A works 5 days, B works 15 days, and C finishes the job in 5 days. How long would C alone take?
- A 15 days
- B 20 days Correct
- C 25 days
- D 10 days
Correct Answer: Option B
A did 5/20 = 1/4; B did 15/30 = 1/2
C did 1/4 in 5 days
C alone = 20 days
Answer: 20 days
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