Question

what is an speed?And Define its Formula?

Answer 1

Speed can be defined as the rate at which a distance is covered in a unit amount of time.

It's formula is
Speed= Distance/Time

Answer 2

Speed is simply defined as the rate at which an object covers a given distance in a particular period of time. Mathematically, it is represented as speed (s) = distance (d)/time (t)

say, for example, if an object travelled 100 meters in 10 seconds then its speed would be

s = 100/10 = 10 m/s

unit of speed is ms -1