Answer:
120 km/h
Explanation:
This is a case of a parabolic motion. For this kind of motion the horizontal component of the velocity does not change in the complete trajectory. That is:
[tex]v_x=constant[/tex]
Then, the velocity of the ball at the moment in which the catcher caught the ball is:
[tex]v=120\frac{km}{h}[/tex]
the velocity of the ball is 120 km/h.