Mathematics · Time and Work
A and B can do a piece of work in 21 days and 14 days, respectively. They started the work by working together, but after 5 days, B left the work and A completed the remaining work. In how many total days was the whole work completed?
- 113(1/2) days✓
- 212(1/2) days
- 313 days
- 410(1/2) days
Correct answer
13(1/2) days
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