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Homework Help: 2 Buses Are Moving

  1. May 6, 2012 #1
    1. The problem statement, all variables and given/known data
    Two buses are moving at constant speeds, in the same direction, the first at 42km/h and the second at 54km/h. They are 18km apart. How long will it take the second bus to catch up to the first?

    2. Relevant equations

    3. The attempt at a solution

    Seems pretty easy, but I've been out of high school for a while so my confidence is relatively low. Here's my attempt:

    42t = 54t - 18
    18 = 54t - 42t
    18 = 12t
    t = 1.5 hours
  2. jcsd
  3. May 6, 2012 #2


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