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Sally can complete a sales route​ by herself in 7 hours. James can do the same job in 9 hours. How long will it take them to do it working together?
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Sally can complete a sales route​ by herself in 7 hours. James can do the same job in 9 hours. How long will it take them to do it working together?

User Aliensurfer
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8.1k points

1 Answer

3 votes

Answer:

(4 days) is the homogeneous mixture

User Icktoofay
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