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18. | What is the overall average speed of the car? | |
A. | 12 | |
B. | 13.3 | |
C. | 40 | |
D. | 48 | |
Answer: Option D | |
Explanation: | |
A racing car accelerates uniformly through three gears, changes with the following average speed: 20 for 2.0 s 40 for 2.0 s 60 for 6.0 s |
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