Klein Valdez
11/13/2023 · High School
10. A can do a piece of work in 80 days. He works at it for 10 days and then \( B \) alone finishes the remaining work in 42 days. In how many days could both do it? 11. A and B can together finish a work in 30 days. They worked at it for 20 days and then B left.
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- Problem 10: A and B together can complete the work in 30 days.
- Problem 11: A can finish the remaining work in 20 days after B leaves.
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