A and B together finish a task in 8 days. A alone finishes it in 12 days. How many days will B take alone?
Correct answer: C. 24
- A. 16
- B. 20
- C. 24
- D. 30
Explanation
This is correct because A = 1/12, A+B = 1/8 ⇒ B = 1/8 − 1/12 = 1/24, so B alone takes 24 days.
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