a vertical concrete dam is built in the ravine between two hills. The face of the dam slopes equally on both sides at an angle of 45.0o to the horizontal. The depth of the fresh water (P = 1000. kg/m3) on the dam face is 20.0 m and the width of the base of the dam is 30.0 m. Find the horizontal force on the dam just due to the water. The answer given was (F= 8.49E7 N) You have to do a integration.