Question 261454
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If you travel 2 hours at 35 mph, then you travel 70 miles.  3 hours at 55 means you travel 165 miles, and 4 hours at 70 is 280 miles.  70 plus 165 plus 280 is 515 miles.  It took 9 hours to travel 515 miles, hence average speed is 515 divided by 9 or just a touch over 57.2 mph.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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