Hey guys im new here i was wondering if anyone can help me understand this problem better 1. The problem statement, all variables and given/known data The base of a certain solid is the circle x^2 + y^2 = 9. Cross sections of the solid with planes perpendicular to the y-axis are semicircles with their diameter in the base of the solid. find the volume of the solid. 2. Relevant equations None 3. The attempt at a solution I cannot figure out where to start this problem. I know this will be an integral from -3 to 3 since its a circle with radius 3, but im not sure how to proceed after that. Can anyone point me in the right direction?