Mathematics · Time and Work
A and B can do a piece of work in 15 days and 25 days, respectively. They worked together for 5 days, after which B was replaced by C, and the remaining work was completed by A and C in the next 4 days. In how many days will C alone complete the same work?
- 125 days
- 215 days
- 320 days✓
- 424 days
Correct answer
20 days
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