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How many millimeters are there in 21 kilometers?

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Anonymous

∙ 15y ago
Updated: 8/16/2019

One kilometre is equal to 1000 x 1000 = 1000000 millimetres. Therefore, 21 kilometres is equal to 21 x 1000000 = 21000000 millimetres.

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Wiki User

∙ 15y ago
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