THE CORRECT ANSWER IS (E). EACH OF THE FOUR OUTER SURFACES OF THE...

36. The correct answer is (E). Each of the four outer surfaces of the cube is 9 square

inches with the other two being 8 (subtract one for the hole), and so the cube contains a

total of 52 square inches of outer surface area. Each of the four inner surfaces (inside

the hole) accounts for an additional 3 square inches—for a total of 12 square inches of

inner surface area. The solid’s total surface area

5

52

1

12

5

64 square inches.