A trough has vertical ends that are equilateral triangles with sides of length 2 ft. If the trough is filled with water to a depth of 1 ft, find the force exerted by the water on one end of the trough. Round to one decimal place. (The weight density of water is 62.4 lb2 /ft3. ) 6.0 Ib 31.2 lb 12.0 lb 62.4 lb