GATE Civil Engineering (CE) 2016 Shift 2 Solved Paper

The soil profile at a site consists of a 5 m thick sand layer underlain by a c-φ soil as shown in figure. The water table is found 1 m below the ground level. The entire soil mass is retained by a concrete retaining wall and is in the active state. The back of the wall is smooth and vertical. The total active earth pressure (expressed in kN/m²) at point A as per Rankine's theory is _________