Question

What is the surface area of the composite figure?

Answer 1

To get his quickly, I would calculate the SA of the top rectangular solid and add it to SA of the bottom rectangular solid.

From that I would subtract 2 X's the little piece where they are connected (which is a 3x3 flat area), because it doesn't appear in either the top or bottom surface area.

SA of a rectangular solid is 2 (l*b*h)

Answer 2

sorry SA = 2 (lb) + 2 (lh)+(2bh)