AP Calculus AB Applications of Integration Problem

IV. The base of a solid is the region bounded by the graphs of x = y and x = 4. 10.) Each cross-section is perpendicular to the x-axis as a triangle of altitude 2. Find the volume of the solid. 11.) Each cross-section is perpendicular to the x-axis is a square. Find the volume of the solid. 12.) Each cross-section is perpendicular to the x-axis is a semi-circle. Find the volume of the solid