The edge of a cube is 6a cm. Find its surface?
Options:
A) 216 a 2
B) 24 a 4
C) 24 a 1
D) 24 a 2
E) 24 a 7

Rationale: "6 a 2 = 6 * 6 a * 6 a = 216 a 2 answer : a"
Answer: A