Can someone me and explain? a machine part consists of two cylinders aligned along the same vertical axis. a scale drawing of the part is represented below. the part is cut in half through the vertical axis. what is the total area, in square inches, of the actual two-dimensional cross-section that is the result of the cut? a. 42 sq in. b. 72 sq in. c. 126 sq in. d. 216 sq in.