SOLUTION: andy's average driving speed for a 4-hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour of his trip?

Question 577789: andy's average driving speed for a 4-hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour of his trip?
Found 2 solutions by rakhileshnaidu, Alan3354:
Answer by rakhileshnaidu(13) (Show Source): You can put this solution on YOUR website!

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
andy's average driving speed for a 4-hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour of his trip?
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4*45 = 180 miles total
3*40 = 120 miles in 3 hours
That leaves 60 miles in 1 hour
--> 60 mi/hr
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Finding avg speeds is not as simple as other averages.

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