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1. N can do a piece of work in 80 days. He works at it for 10 days and then M lone finishes the remaining work in 42 days. In how much time will N and M, workings together, finish the work?
- A. 24 days
- B. 24 days
- C. 24 days
- D. 24 days
Answer: Option B
Explanation:
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