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Two trains start from the same place at the same time. They travel i~ opposite directions. One
averages 60 miles per hour and the other averages 80 miles per hour. After how long will they
be 420 miles apart?

  • Algebra -

    They each travel for t hours

    distance covered by first train = 60 t miles
    distance covered by 2nd train = 80t miles

    60t+80t = 420
    140t = 420
    t = 3

    3 hours.

  • Algebra -


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