A retaining wall with base width $(B=2\mathrm{.}0)m,$ bearing layer has, cohesion $=70$

$K\frac{N}{m^2},$ angle of internal friction $=10$ degree, $g_{\text{a}\text{l}\text{l}}=100K\frac{N}{m^2},$ unit weight $=20$

$\{$:$K\frac{N}{m^3}).D_f=1\mathrm{.}0m$

Given:

Total vertical forces $=500K\frac{N}{m},$ total sliding force $=130K\frac{N}{m}$

Total resisting moment $=850KN*\frac{m}{m}$

Total overturning moment $=500KN*\frac{m}{m}$

Check stability against bearing capacity.

Check stability against sliding, if not safe find the required depth of the key.