Mathematics · Time and Work
A and B can complete a work alone in 20 days and 60 days respectively. They began the work together but A left the work after some days and B completed the remaining work in 12 days. After how many days from the beginning did A leave the work?
- 115 days
- 210 days
- 39 days
- 412 days✓
Correct answer
12 days
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