Problem:
On a trip, a car traveled miles in an hour and a half, then was stopped in traffic for minutes, then traveled miles during the next hours. What was the car's average speed in miles per hour for the -hour trip?
Answer Choices:
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B.
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D.
E.
Solution:
During the hours, the car traveled a total of miles for an average speed of miles per hour.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions