Can someone please help 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.
