A tank is filled with water to a height H. A hole is made in one of the walls at a depth D below the water surface. The distance x from the foot of the wall at which the stream coming out of the tank strikes the ground is given by:

• A

  $\mathrm{X}=2{\left[\mathrm{D}(\mathrm{H}-\mathrm{D})\right]}^{{\displaystyle \raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}}$

• B

  $\mathrm{x}=2{(\mathrm{g} \mathrm{D})}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}$

• C

  $\mathrm{x}=2{\left[\mathrm{D}(\mathrm{H}+\mathrm{D})\right]}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}$

• D

  none of these