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    anne21's Avatar
    anne21 Posts: 9, Reputation: 1
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    #1

    Oct 23, 2007, 04:47 PM
    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?? :)
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Oct 23, 2007, 05:07 PM
    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.
    klonkj's Avatar
    klonkj Posts: 1, Reputation: 1
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    #3

    Jan 6, 2012, 02:05 AM
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