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A car covers 120 km in 2 hours. By the mean value theorem, at some instant its speed equals
A90 km/h
B30 km/h
C60 km/h
D120 km/h
Answer & Solution
Correct answer: C. 60 km/h
The average speed is 120/2 = 60 km/h, and the theorem says the instantaneous speed matches it at some moment.
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