A tank is filled with water up to height H. Water is allowed to come out of a hole P in one of the walls at a depth D below the surface of water as shown in the figure. Express the horizontal distance x in terms of H and D :
1
\(x\, =\, \sqrt{D(H - D)}\)
2
\(x =\, \sqrt{\displaystyle \frac{D(H - D)}{2}}\)
3
\(x=\, 2\sqrt{D(H - D)}\)
4
\(x=\, 4\sqrt{D(H - D)}\)