Answer: 6400 km = 3,976.775 mi.
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6,400 kilometers = 3,976.8 miles.
64 km = 6400 m
Answer: 6400 m = 3.97677 mi.
1 km = 1000 m so 6.4 km = 6400 m
There are 5280 lateral feet per mile; therefore, 6400 lateral feet = 6400/5280 = 1.212 mile.