How fast did the car move if it covered 9 km in 5 minutes?

If we assume that the movement of the car was uniform, then the speed of the car can be calculated by the formula:
V = S / t, where S is the distance traveled by the car (S = 9 km = 9 * 10³ m), t is the time of movement of the car (t = 5 min = 5 * 60 s = 300 s).
Let’s calculate the speed of the car:
V = S / t = 9 * 10³ / 300 = 30 m / s.
Answer: The car was moving at a speed of 30 m / s.

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