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Find time

  1. May 25, 2008 #1
    1. two trains 200 meteres and 150 meters are running on the parallel rails at this rate of 40 km/hr and 45 km/hr.in how much time will they cross each other if they are running on the same direction

    2. Relevant equations

    3. speed=distance/time
    train1 =200*40*5/18
  2. jcsd
  3. May 25, 2008 #2

    Chi Meson

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    Science Advisor
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    All that matters are their relative displacement and their relative speed.

    How far apart are they, initially?

    What is the difference in their speeds?
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