Math..

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A car goes at 40 miles per hour and returns at the same route at 30 miles per hour. What is the total distance if the time is 1 hour?
My answer
17 and 3/7

  • Math.. -

    let the time for first trip be t hrs
    then the time for the return trip is 1-t hrs

    so 40t = 30(1-t)
    40t = 30 - 30t
    70t = 30
    t = 3/7 hrs

    distance = 40t = 40(3/7) = 120/7 miles
    or appr 17.14 miles

    looks like your answers are correct, make sure you state them in the proper way.

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