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A train left Podunk and traveled west at 70 km/h. Two hours later, another train left Podunk and traveled east at 90 km/h. How many hours had the first train traveled when they were 1420 km apart?

How do you solved this?

  • math -

    I translated your English into Math and got
    70t+140 + 90t = 1420

    Take it from there.

  • math -

    where did you get 140 from?

  • math -

    didn't the first train go for 2 hrs at 70 km/h ? How far did it go in that time ?

  • math -

    Got it. Thank you very much

  • math -

    Welcome!

  • math -

    a train left podunk and traveled north at 75 km/h. two hours later, another train left podunk and travled in the same direction at 100 km/h. how many hours had the first train traveled when the second train overtook it?

    can someone help set this up?

  • math -

    8 hrs.....

  • math -

    aly, its not 8 hrs......

  • math -

    You would set them up equal to each other.
    Looks like.
    75T + 150 = 100T
    T= 6

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