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March 26, 2017

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A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane cruised at 300km/h when flying east, and 400km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?

  • Anyone Please Help! - ,

    Let t be the time of the motion to east =>
    300•t=400(7-t)
    300t=400•7-400t
    700t=400•7
    t=4 hours
    s=300•t=300•4=1200 km

  • Anyone Please Help! - ,

    thanks

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