What is the volume of a cube?
I. The area of each face of the cube is 64 square metres.
II. The length of one side of the cube is 8 metres.
Choose the correct choice from the following choices.
A) I alone sufficient while II alone not sufficient to answer  B) II alone sufficient while I alone not sufficient to answer  C) Either I or II alone sufficient to answer  D) Both I and II are not sufficient to answer  E) Both I and II are necessary to answer
EXPLANATION   Let each edge be a metres. Then,   I. a2 = 64 a = 8 m Volume = (8 x 8 x 8) m3 = 512 m3.   Thus, I alone gives the answer.   II. a = 8 m Volume = (8 x 8 x 8) m3 = 512 m3.   Thus, II alone gives the answer.   Either I or II alone sufficient to answerorrect answer is (Either I or II alone sufficient to answer).
<result>C</result>
What is the volume of a cube?
I. The area of each face of the cube is 64 square metres.
II. The length of one side of the cube is 8 metres.