40km * 60 seconds = 2400 KPH.
2400km * 60 minutes =
144000 KPH.
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63 miles per second = 365,000 kilometers per hour.
Six miles per second is the same as 21,600 miles per hour or 34,760 kilometers per hour.
25km/sec equates to 55,923.41 miles per hour.
5,795 kilometers per second = 12,963,050 miles per hour (rounded)
Miles per hour x 1.6093 = kilometers per hour