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Technically, a ruler or tape measure is used to measure any length. In the case of

large, unwieldy lengths, other more practical and more convenient devices are used,

such as odometers, RADAR, SONAR, laser rangefinders, and triangulation methods.
Kilometers can be measured by ruler, tape-measure, laser-rangefinder, SONAR or RADAR.

But by far the most popular instrument for the purpose is the odometer (the 'mileage'

counter) in any Canadian or European car.

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11y ago

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