Q1:

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.

ANS:D - Both I and II are not sufficient to answer

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.  Correct answer is (C).