Question

define speed ? SI unit of speed ?

Answer 1

Speed is the rate at which someone or something moves or operates or is able to move or operate.
km/hr is the SI unit of speed. 

Answer 2

Heya user ☺
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Speed :- Speed can be defined as the total Distance travelled by a body in per unit time


As we know that Measurements are. Divided into their different uses according to how these measurements serve

Like - SI unit , CGS unit etc

SI unit of Speed :-

We know ,

Speed = Distance/ Time
Distance is measured by the SI unit called meter and time by the Second

Hence SI unit of Speed is
m/s


Thanks