posted by Joslyn .
What was the average speed in km/h of a car that travels 400km in 4-5h?
physical Science -
I assume that you mean "4 to 5 hours" and not 4.5 hours.
In that case, the answer is: Between 400/5 and 400/4 km/s.
That is a range of 80 to 100 km/h