A retaining wall $6\text{ m}$ high, with a smooth vertical back is pu…

Previous year question for Exam.

Question

A retaining wall $6\text{ m}$ high, with a smooth vertical back is pushed against a soil mass having $c' = 40\text{ kN/m}^2$ and $\Phi = 15^\circ$, $\gamma = 19\text{ kN/m}^3$. What is the total Rankine passive pressure, if the horizontal soil surface carries a uniform load of $50\text{ kN/m}^2$ ? What is the point of application of the resultant thrust ?

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