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Anonymous
1 km = 1000 metres and 1 metre = 100 cm so 1 km = 105 cm
So 400 km = 4*107 cm.
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400 km in what time is missing
400 km = 4*1014 nm
400 inches is 1,016cm
There are 100,000 centimeters (cm) in a kilometer (Km).
87.6 cm = 0.000876 km