Question $6$

The Figure shows the section through a gravity wall made of concrete with unit weight of $24\mathrm{.}3k\frac{N}{m^2}.$ The height of the wall is $2\mathrm{.}9$ m $.$ The backfill surface is slopping at $=14$ from the horizontal. The unit weight of backfill is $17k\frac{N}{m^3}$ with cohesion parameters of $c^{\text{'}}=0$ and active lateral earth pressure coefficient of $0\mathrm{.}28[$ in the direction of resultant lateral force$].$ The friction between soil and concrete $8^{\text{'}},$ is $13.$ The ultimate bearing capacity of the foundation soil is $190$ kPa $.$ Determine the sum of resisting moments about the toe $)(1d.p).$ Clockwise moments are $+$ve$.$ All intermediate calculations $(4$ dp $).$

The correct answer is $114\mathrm{.}0988($margin of error $\frac{+}{-}0\mathrm{.}9).$ Please provided detailed solutions to this question