Speed is the rate at which an object covers a distance. Speed is a scalar quantity. It has no direction .
Velocity may be defined as the rate of change of displacement.
It can be also defined as : “ rate of change of position of an object.”
Velocity is a vector quantity. It has direction.
For example : If an object moving with a speed of 65 km / hr towards East direction. Then we say its speed is 65 km/hr East.