Problem:
In the adjoining figure, a wooden cube has edges of length meters. Square holes, of side meter, centered in each face are cut through to the opposite face. The edges of the holes are parallel to the edges of the cube. The entire surface area including the inside, in square meters, is
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Each exterior unit square which is removed exposes interior unit squares, so the entire surface area in square meters is