Multiply km/hr by 0.62137 mi/km to get miles per hour: 263* 0.62137 = 163.420 mph
(the rough conversion is 5/8 miles per km, or 8/5 km per mile)
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Two miles per hour.
1.5 kilometers per hour=0.932056788 miles per hour
10 miles per hour = 142/3 feet per second
32 mph = 51.499 kilometres per hour.
About 55 miles per hour.