The answer is follows:
750 000 millimetres per second is equal to 0,75 kilometres per second.
There are 60 minutes in an hour and 60 seconds in each minute,therefore
0.75 km * 60 * 60 = 2 700 km/h
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302 kilometers per hour is faster than 67.9 meters per second. You can convert 67.9 meters per second to kilometers per hour (67.9 * 3.6 = 244.4 kilometers per hour) to compare.
To convert 80 millimeters per second to miles per hour, you first convert millimeters to miles and seconds to hours. There are approximately 0.000000621371 miles in a millimeter and 3600 seconds in an hour. So, 80 millimeters per second is roughly 10.56 miles per hour.
24km per hour is 62/3 metres per second.
Meters per second x 3.6 = kilometers per hour: 3,500 x 3.6 = 12,600 km per hour
About 3,712.8 km/h