Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of
A
$$\frac{{\text{h}}}{4}$$
B
$$\frac{{\text{h}}}{3}$$
C
$$\frac{{\text{h}}}{2}$$
D
$$\frac{{2{\text{h}}}}{3}$$
Correct Answer: $$\frac{{\text{h}}}{3}$$