Magnitude of velocity of a body on reaching the point from which it was projected upwards is

Velocity of body while reaching point of projection is same as at velocity projection in reverse direction

$$\begin{gathered} we know , V=u+at \\ while projecting up a=-g \\ time flight=t=\frac{2u}{g} \\ velocity on reaching point of projection =V=u+(-g)\left(\frac{2u}{g}\right) \\ V=-u \\ body on reaching point of projection will have same velocity as at projection but opposite in direction as we obtained negative in the solution \end{gathered}$$