<PRE><B>Question 261454</B>
You travel 2 hour at 35 mph, 3 hours at 55 mph and 4 hours at 70 mph. What is your average speed?
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rate = (total distance)/(total time)
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total distance = 2*35+3*55+4*70 = 515 miles

total time = 2+3+4 = 9 hrs
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rate = 515/9 = 57.22 mph
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Cheers,
Stan H.</PRE>