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?5
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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?
- 1\({40\over3}\)true
- 210false
- 38false
- 430/7false
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