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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?

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?

asked
User Aliensurfer
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7.9k points

1 Answer

3 votes

Answer:

(4 days) is the homogeneous mixture

answered
User Icktoofay
by
8.2k points
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