Q: A truck driver drives at a speed of 60 km/h for three hours. Then he stopped for an hour and did not go and where After that, he drives at a speed of 60 km/h for four hours what was the average speed of that driver (in km/h)?
A.
50.5
B.
62.4
C.
42.8
D.
52.5
Correct Answer:
Option D -
Explanations:
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