A 120 foot high dam is shaped by the symmetric function y = 2x^(4/3). The water level is at the top of the dam. Set up an integral that gives the total water pressure against the dam. Water weights 62.5 lbs per cubic foot. S = integral sign P = F / A but teacher's answer is 120 S 62.5(120-y)*2(y/2)^(3/4)dy 0 I understand the 2(y/2)^(3/4)dy part, its the area, but I dont get what is 62.4(120-y), its seems to me that the teacher is doing P = F * A, which is wrong... if I m not wrong... please help me clear this... Final coming!!!