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Mathematics for IGCSE & O level - Rates (Section 2 - No. 3)

A runner covers 180 meters in 40 seconds. What is the average speed?
4.5 m/s
4 m/s
5.5 m/s
6 m/s

解释

Speed = Distance / Time. Speed = 180 m / 40 s = 4.5 m/s

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