Speed is the rate of motion or how fast something moves. It's symbol can be kmph, km/h, or mph
It is calculated simply with the formula Distance x Time. For example, if a van travelled 35km in half an hour, it's travelling speed is 70 km/h.
Speed can likewise be used to find a certain distance or time. For example, if a fighter jet used on national day flew for 12 minutes at 2000km/h across Singapore, the distance it flew is 12/60*2000km which is 1/5*2000km which is 400km!
This is just about what speed is about.
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