During the First 18 Minutes of a 1

question 27

Multiple Choice

During the first 18 minutes of a 1.0-hour trip, a car has an average speed of 11 m/s. What must the average speed of the car be during the last 42 minutes of the trip be if the car is to have an average speed of 21 m/s for the entire trip?

• A)21 m/s
• B)23 m/s
• C)25 m/s
• D)27 m/s
• E)29 m/s

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