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26 November, 21:45

Ricky can paint a room in 4 hours. carrie can paint the same room in 3 hours. working together, how long would it take them to paint the room?

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  1. 27 November, 00:56
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    R can pain the room in 4 hours, C can paint the room in 3 hours

    Both can paint the room in 1 / (1/3 + 1/4) hours

    =12/7 hours
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