It is not an item, it is a measure containing 1000 meters or 100,000 centimeters
1 mile = 1.609344 kilometres>:d
Probably no individual item. But the combined length of all the fibres in carpets, or all the yarn in clothes, all the strands of wires in cables would measure kilometres.
The item with the shortest length on that list is 10 centimeters.
A square kilometer is a square that measures 1 kilometer by 1 kilometer
There are 39,370,079,000 microinches in a kilometer.
kilometer
There are 500 meters in a half kilometer; a kilometer is 1,000 meters.
The measure unit of a kilometer stick is kilometer.
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