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math

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Megan and Sam together take 12 minutes to wash a car. Washing the car by herself took Megan 21 minutes. How long would it take Sam to wash the car?

  • math - ,

    1/both = 1/megan + 1/sam
    1/12 = 1/21 + 1/s
    s = 28

  • math - ,

    I like chicken

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