One kilometre is 1000 metres. So one kilometre per hour is 1000 metres per hour.
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6000 meters per 6km (1000m per kilometer).
1,609.344 meters per hour.
1 meter per minute is only 60 meters per hour, but 1 kilometer per hour is 16-2/3 meter per minute. So any number of kilometers per hour is 16-2/3 times as fast as the same number of meters per minute.
The conversion factor is 3.6. So, meters per second x 3.6 = kph.
Answer: 55 mph = 88.5139 km/h