Final answer:
The basic unit of speed is km/h, representing the distance traveled in kilometers over an hour.
Step-by-step explanation:
The basic unit of speed is in fact km/h. Kilometers per hour (km/h) is a commonly used unit to measure speed. It represents the distance traveled in kilometers over a period of one hour. Other common units of speed include meters per second (m/s) and miles per hour (mph).
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