SOLUTION: David is driving 200 miles and must complete the trip in 3 hours. if he averages 65 mph the first hour and 71 mph the second hour, what is the average speed David must drive during

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Question 905505: David is driving 200 miles and must complete the trip in 3 hours. if he averages 65 mph the first hour and 71 mph the second hour, what is the average speed David must drive during the third hour to reach his destination in 3 hours total?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
200 - 65 - 71 = 64mi to go at 64mph to make it in 3 hrs