under properties of streamline : fluid velocity remains constant at any point of a streamline but it may be different at different points of the same line. can u plse explain these with a diagram

In a streamline flow, velocity (speed and direction) at each point in the flow remains constant—this does not necessarily require that the velocity be the same at all points in the fluid.

i.e., as in fig. if the velocity of a particle passing through the given point is v, then all the successive particles passing through this point will have the velocity v at that instant. But the velocity of the particles at different points in their path may not necessarily be the same.