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1. |
Q: A and B together can complete a work in 10 days. A alone can do it in 40 days. In how many days B alone can complete it? |
A. | \({40\over3}\) |
B. | 10 |
C. | 8 |
D. | 2021-07-30 00:00:00 |
Answer» B. 10 | |