5/189 Calculate the depth h of mud for which the 3-mconcrete retaining wall is on the verge of tippingabout its forward edge A. The density of mud maybe taken to be and that of concrete tobe .

Representative Problems5/195 The cross section of a fresh-water tank with aslanted bottom is shown. A rectangular door 1.6 mby 0.8 m (normal to the plane of the figure) in thebottom of the tank is hinged at A and is openedagainst the pressure of the water by the cableunder a tension P as shown. Calculate P.

5/196 The sides of a V-shaped fresh-water trough, shownin section, are hinged along their common intersectionthrough O and are supported on each side byvertical struts hinged at each end and spaced every2 m. Calculate the compression C in each strut.Neglect the weights of the members.