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Math

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Is this correct?
Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 miles per hour and train B is traveling at 80 miles per hour. Train A passes a station at 3:25pm. If train B passes the same station at 3:40p.m., at what time will train B catch up with train A?
My answer is 4:25pm

  • Math -

    A goes distance d in t hours
    B goes distance d in (t -.25) hours because 15 minutes is .25 hours
    so
    60 t = 80 (t - .25)
    20 = 20 t
    t = 1 hour
    so yes
    4:25 pm

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