Answer: 54 mph (miles per hour)
Step-by-step explanation: 162 divided by 3 = 54
The average speed Sophie of which drove is 54 miles/hour.
Given that, Sophie drove 162 miles in 3 hours.
The formula to find the speed of the object is Speed=Distance/Time.
Now, Speed=162/3=54 miles/hour.
Therefore, its average speed is 54 miles/hour.
To learn more about the average speed visit:
https://brainly.com/question/9834403.
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