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A km is a kilometer, or kilo-meter. Kilo means 1,000, thus 1,000 meters. An mm, or millimeter is 1/1,000 of a meter. They are related in that they are the conjugate of each other: km= 1,000 m, mm= 1/1,000 m.

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Trever Windler

Lvl 13
3y ago

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