Average speed is measured in SI units as :

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m/s

km/s

cm/s

mm/s

answer is A.

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Detailed Solution

Concept: The overall distance traveled by the object in a given time frame is the average speed. A scalar quantity is average speed. It is expressed by magnitude and lacks direction.
Each value has its own unit, such as length in meters, mass in kilograms, etc.
Time is measured in seconds; average speed is measured in m/s.
The SI unit of displacement is meters per second. As a result, the standard international unit of average velocity will be =m/s.
Meters per second is the SI unit for average velocity.
Hence, the correct option is 1.

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