I need to find the volume of this right circular cylinder as a function of the depth of the fluid. I am having trouble starting this problem. http://img351.imageshack.us/img351/210/volume4ju.jpg [Broken] I realize the equation for the cross sectional view of the cylinder is [tex]x^2 + y^2 = 1^2 [/tex]. Any suggestions on what to look at next? Should I be looking to set up an integral to find the area of that circle as a function of the depth of the fluid? Then, once I do that, find an integral to get me the volume of the fluid across the length cylinder?