1.60934 km per hour
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Answer: 216 km/h = 134.216 mph
A
(90 mile/hour) x (1.609344 kilometer/mile) x (1 hour/3,600 sec) = 0.04023 km/sec (rounded)40.234 meters per second (rounded)
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)
1482 metres per sec = 5335 km per hour = 3315 miles per hour