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drove from rich to boston at avg speed of 50 mph,if it took 5 hrs to drive from rich to phila at an avg speed of 70 mph and if the whole trip took 13 hrs how far is it from phila to boston?

  • math -

    Answered earlier today:

    http://www.jiskha.com/display.cgi?id=1282735117

  • math -

    "Rich?" Is that supposed to be Richmond VA?

    Rich to Phila distance = 70x5 = 350 miles

    Boston to Phila distance = X

    (X + 350)/13 = 70 mph

    Solve for X

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