Answer: 5.5 km = 3.41754 mi.
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A mile is approximately 1.6 km. So you would multiply the mph by 1.6 to get the kmph. Lets say you were going 55 mph: 55 mi* 1.609344 km 1 mi = 88.51392 km
1.6 km per mile
One mile = 1.609 km
1 mile = 1.6093 km
Answer: 1 km = 0.621371 mi.