Which unit is usually used for speed while travelling long distances?
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Explanation:
The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph). For air and marine travel the knot is commonly used.
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Speed
SI unit m/s, m s−1
Dimension L T−1
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