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6 November, 03:04

John does a job in 16 hours. joe does the same job in 22. how long if they work together?'

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  1. 6 November, 03:05
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    Joe's working rate = 1/16 per hour

    Joe's working rate = 1/22 per hour

    Let t = hours spent when working together.

    Then

    t = 1 / (1/16 + 1/22)

    = 1 / (0.0625 + 0.0455)

    = 9.263 hours

    = 9 hours + 0.263*60 min

    t = 9 hours, 16 minutes

    Answer: 9 hours, 16 minutes
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