Question: Some data for a possible planar block slide are given in the sketch. If ? = 35?, ? = 45?, and H = 475 ft

Some data for a possible planar block slide are given in the sketch. If ? = 35?, ? = 45?, and H = 475 ft (145 m), what cohesion c (psf, kPa) is needed to give a safety factor of at least 1.5?

2 WT = 28 c=? y=160 pcf (25.3 kN/m) WT

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