# GATE Papers >> Civil >> 2013 >> Question No 38

Question No. 38

Two different soil types (Soil 1 and Soil 2) are used as backfill behind a retaining wall as shown in the figure, where ${\gamma }_{t}$ is total unit weight, and c' and $\mathrm\phi$ ' are effective cohesion and effective angle of shearing resistance. The resultant active earth forceper unit length (in kN/m) acting on the wall is: