algebra

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Trains A & B are traveling in the same direction on a parallel tracks. Train A is traveling at 60 mph and train B is traveling at 80 mph. Train A passes a station at 5:15 PM. If train B passes the same station at 5:30 PM, at what time will train B catch up to train A?

When will train B catch up with train A?

  • algebra -

    train A goes t hours
    train B goes (t-.25) hours
    distance is the same
    so
    60 t = 80(t-.25)
    solve for t in hours
    add that to 5.25 to get time in hours
    convert fractional hours to minutes

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