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-   -   May can clean a house in 10 hours. Working together, May and John can clean a house 7 (https://www.askmehelpdesk.com/showthread.php?t=641180)

  • Mar 5, 2012, 08:25 AM
    Chiaravon
    May can clean a house in 10 hours. Working together, May and John can clean a house 7
    May can clean a house in 10 hours. Working together, May and John can clean a house 7 hours. How long will it take John to clean a house by himself?

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