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A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 564 km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. Use an equation to find how long the second jet will take to overtake the first.

  • Algebra -

    Use the fact that at the moment of "overtaking" they would have gone the same distance

    Time for slower plane --- t hrs
    time for faster plane ---- t-1 hrs

    564t = 744(t-1)

    continue, solve for t ,

  • Algebra -

    that was a half hour later.

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