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-   -   Quadratic function-word problems (https://www.askmehelpdesk.com/showthread.php?t=144125)

  • Oct 23, 2007, 04:47 PM
    anne21
    Quadratic function-word problems
    Dieter makes a journey of 430 km, traveling 160 km by bus and 270 km by car. If the car averages 10km/h faster than the bus and the whole journey takes 5h, what is the speed of the car?

    I don't get the question.. can anyone help me?? :)
  • Oct 23, 2007, 05:07 PM
    galactus
    Use d=rt.

    Let r = the bus rate. Then the car's rate is r+10.

    Since the total time traveled is 5 hours, we have d/r=5



    Solve for r.
  • Jan 6, 2012, 02:05 AM
    klonkj
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