A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?

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Question:A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?

1.15

2.15/2

3.17

4.17/3

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  1. A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?
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