The average speed of the car is 88.88 km/h.
What is average speed?
The average speed of any moving object is the ratio of the total distance covered and the total time taken to cover that distance.
Given is the distance d =400 km and the time t= 4.5h
Average Speed = d/t
Average Speed =400/4.5 km/h
Thus, the speed of the car is 88.88 km/h.
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