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Speed = Distance / time

Speed measures the unit rate of distance over time. It measures how fast an object travels in a given unit of time.

For example: The rolling can travels downhill. It travels the distance of 10 feet in 5 seconds. Get the speed.

Speed = 10 feet / 5 seconds = 2 feet per second.

2 feet per second is the unit rate traveled by the can rolling downhill.
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