Motion In A Plane

Two paper screens \(A\) and \(B\) are separated by \(150 \mathrm{~m}\). A bullet pierces \(A\) and than \(B\). The hole in \(B\) is \(15 \mathrm{~cm}\) below the hole in \(A\). If the bullet is travelling horizontally at the time of hitting \(A\), then the velocity of the bullet at \(A\) is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)