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Determine the depth at which a circular footing of (2+0.4Y) m diameter be founded to provide...

Determine the depth at which a circular footing of (2+0.4Y) m diameter be founded to provide a factor of safety of 3, if it has to carry a safe load of (1500+10Y) kN. The foundation soil has a cohesion of 10kN/m2, an angle of internal resistance of (30 +Y)o. The water table is at the ground surface and the unit weight of the soil is 19 kN/m3. Use Terzaghi’s Analysis.

y=2
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