Two buildings are 40m apart with what velocity should a ball be thrown horizontally from a window 145 m above the ground in one building so that it will enter a window $22.5 m$ above the ground in second building? $(g=9.8 m/s^2)$

Question

\[(a)\;4 m/s \quad (b)\;6 m/s \quad (c)\;12 m/s \quad (d)\;8 m/s\]