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    emat22's Avatar
    emat22 Posts: 7, Reputation: 1
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    #1

    Aug 31, 2008, 09:21 AM
    I don't know the equation to use
    Two locomotives approach each other each going 95 km/ hr. if they are 8.5 km apart, how long will it be before they reach each other?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Aug 31, 2008, 09:27 AM
    Have a simple sketch, this will help you to see where they will meet if they are going at the same speed. If you can solve it, then it's OK. But if you are still stuck, post again.
    emat22's Avatar
    emat22 Posts: 7, Reputation: 1
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    #3

    Aug 31, 2008, 09:32 AM
    I have a sketch. Mathematically I can't find the anwer. My books says it will take 2.7 minutes for the two trains to meet each other.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Aug 31, 2008, 09:34 AM
    If they are 8.5km apart, and they are moving in at the same speed, they should meet halfway of their distance, that is 8.5/2. Can you do it now?
    emat22's Avatar
    emat22 Posts: 7, Reputation: 1
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    #5

    Aug 31, 2008, 09:49 AM
    The question doesn't ask me where they'll meet, its when they will collide...
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #6

    Aug 31, 2008, 09:53 AM
    Now, using the equation Speed = Distance / Time, solve for time, you just have the distance, you already have the speed! Got it? Well I got it 2.7 min.
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