Extracted text: B) Find the minimum value of Z for which the gate shown in Fig. (5) will rotates counterclockwise if the gate is (a) rectangular, 1.2 by 1.2 m; (b) triangular, 1.2 m base as axis of motion, height 1.2 m. 27.6 KPa Water OV Gas (a) (b) 1.2 m