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math

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An airplane flying against the wind travels 100 miles in the same amount of time it would take the same plane to travel 140 miles with the wind. If the wind speed is a constant 40 miles per hour, how fast would the plane travel in still air?

  • math - ,

    100/(p-40) = 140/(p+40)

    p = 240

  • math - ,

    ,ll

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