1. A 3-m-high, 6-m-wide rectangular gate is hinged at the top edge at A and is restrained by a ridge at B (Figure, 1). The weight of the gate is 20kN. Determine: (a) the hydrostatic force exerted on the gate by the 5 -m high water, (b) the location of the center of pressure (c.p.), and (c) the reaction at ridge B. [3+3+3=9] Given: Specific weight of water, Yw=9.81kN/m3. Figure 1