Student: The edge of a cube is 4a cm. Find its surface?
Options:
(A) 24a8
(B) 24a4
(C) 96a2
(D) 24a2
(E) 24a7.
Another student: Let's say, hmmm...
6a2 = 6 * 4a * 4a = 96a2 Final answer: (C).