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Math Help - Word Problem: A vehicle is traveling....

  1. #1
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    Word Problem: A vehicle is traveling....

    Please help, I'm not sure if this is the right place or what the formula is but here is the question...
    An SUV is traveling 86 miles per hour. The car in front of the SUV is traveling at 55 miles per hour. The car is 70 feet in front of the SUV. How many seconds would it take for the SUV to hit the car in front of it?

    If anyone can answer this can u please give me the formula as well? Any help is much appreciated. Thanks
    Last edited by CaptainBlack; November 19th 2011 at 08:49 PM.
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  2. #2
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    Re: Hope this is the right place. A vehicle is traveling....

    are they riding in the same or opposite direction?

    same direction -> solve (86miles/h-55miles/h)t=70feet
    opposite direction -> solve (86miles/h+55miles/h)t=70feet

    Take care of dimensions.
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  3. #3
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    Re: Hope this is the right place. A vehicle is traveling....

    The same direction, I'm sorry I don't know how to solve that?
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  4. #4
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    Re: Hope this is the right place. A vehicle is traveling....

    (86miles/h-55miles/h)t=70feet
    t=70feet / 31miles/h = (70feet / (5280*31feet))*3600s=1,539s
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