A stone is projected from the edge of a vertical cliff \(25\text{ m}\) high with a speed of \(20\text{ m s}^{-1}\) at \(30^\circ\) above the horizontal. It lands on the level ground at the foot of the cliff, as shown. Air resistance is negligible. \(\left[g=10\text{ m s}^{-2}\right]\)



How far from the foot of the cliff does the stone land?