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anonymous

  • 5 years ago

Tina can paint a room in 8 hours, but when she and her her friend Emily work together, they can complete the job in 3 hours. How long would it take Emily to paint the room alone?

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  1. anonymous
    • 5 years ago
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    T can paint a room in 8 hrs, Thus in 1 nr T can paint 1/8th of the room T+ E can paint a room in 3 hrs, thus in 1 hr T + E can paint 1/3 rd of the room Thus E alone, in one hour can paint 1/3-1/8 of the room = 5/24 th of the room Thus E will need 24/5 hours to paint the whole room alone = 4.8 hrs

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