Question 359494
Chris's average speed for a 6 hour trip was 70 mph.  For the first 4 hrs, Chris drove at 62 mph.  What was his average speed for his last 2 hours of his trip?
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so he drove 6*70 = 420 miles on the trip.
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4 hours 62mph 
distance = 248 miles
Balance distance = 420-248=172
speed = distance/time
speed = 172/2
speed = 86 mph in the last two hours
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m.ananth@hotmail.ca
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