4.5 meters in 9 second how fast in kilometer per hour?
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(P meter/second) x (1 kilometer/1,000 meters) x (3,600 second/hour) = 3.6 P kilometer/hour
1 kilometer = 1000 meter 1 hour = 3600 seconds 846 kilometer/hour x 1 hour/3600 seconds x 1000 meter/kilometer = 235 meters/second you may try the online converter linked below
15.6464 meters per second
The conversion factor for converting from km per hour to meters per second is 0.2778km/h x 0.2778 = meters per second
119 meters per second is about 266.2 mph.