Question

How to measure the speed?

Answer 1

speed is how fact things are moving
for example: A car is moving at 50 m/s speed what does it mean?

In one second, Car covers 50 m and in 2seconds, it covered 100 m
$Speed=\frac{Distance}{time}=\frac{\frac{50}{\text{/}100m}}{\text{/}2sec}=50m/s$
How fast Car covers the distance