1. The problem statement, all variables and given/known data A swimming pool is circular with a 40-ft. diameter. The depth is constant along east-west lines and increases linearly from 2 ft.at the south end to 7 ft. at the north end. Find the volume of water in the pool. 2. Relevant equations Dont know how to enter integrals here, but we need to use the polar coordinates here. Refer to this: http://tutorial.math.lamar.edu/Classes/CalcIII/DIPolarCoords.aspx 3. The attempt at a solution I know how to integrate and find the volume. I am having trouble decomposing the problem into a picture and finding the limits.