90 km/h correspond to approximately 25 metres per second.
To respect and really understand the tremendous speeds at which you often travel when driving a car, it is good to know how many metres per second (m/s) different speeds correspond to.
Divide the speed by 3.6 to convert kilometres per hour to metres per second. But if you just remember that 10 km/h equals about 3 m/s, the other speeds are easy to estimate.
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