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 t

Question

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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Adalynn 2 days 2021-10-12T06:24:19+00:00 1 Answer 0

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    2021-10-12T06:25:26+00:00

    Answer:

    (4 days) is the homogeneous mixture

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27:3+15-4x7+3-1=? ( )