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Neither miles nor km. are more or less precise. The advantages of using the metric system (SI, to be prcise) are (1) That it is easier to do conversions; for example, 17 km. = 17,000 m. (just add three zeroes); try to do the same with miles and feet! (2) That it is an international standard; it makes it easier to communicate if everyone uses the same units.

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15y ago

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