1.5km per seconds
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If you mean what is 90km/h converted to km/s then the answer is 0.025km/s (or 25m/s).
(100 / 4 ) meters per second100 meters in 4 seconds = 25 meters per second100 m / 4 s = 25 m / sMultiply by 60 for meters per minute25 m * 60 sec = 1500 m / minMultiply again by 60 for meters per hour1500 m * 60 min = 90,000 m / hrDivide by 1000 for kilometers per hour90,000 m/hr / 1000 m/km = 90 km / hrOne kilometer = .621 miles to convert to mph90 km/hr * .621 mi/km = 55.89 mph
distance = rate * time 80 km = r * 38 minute r = 80 km / 38 min * 1000 m/km * 60 seconds/minute = 4800000/38 ~= 126315.79 m/s
to make cm to km, divide by 100000. = km/s to convert from per second to per hour, multiply by 360 overall: *360/100000
U can convert km/h into m/s by multiplying it by 5/18. Here 18km/h = 5m/s