Refer to the 15-m-high wall shown in the figure. Assume that the retaining wall shown in figure can yield sufficiently to develop an active state (i.e., before the tensile crack occurs).
(a) Determine the Rankine active force per unit length of the wall.
(b) Determine the location of the resultant line of action.
Assume, γ_{w} = 10 kN/m^{3}
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