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Extracted text: SITUATION. A trapezoidal masonry dam with vertical upstream face is 6 m. high, 0.6m. at the top and 3 m wide at the bottom. Weight of concrete is 23.5 kN/m3. Compute the factor of safety against sliding if the coefficient of friction on the base is equal to 0.80. Consider the hydrostatic uplift. 1.2 1.02 1.47 1.32