Question

If V and S denote the volume and the total surface area of a cuboid (of sides a, b and
c) respectively, then which of the following is true?

A (1/V) = (2/S) (1/a + 1/b + 1/c)
B (1/V) = (1/S) (2 + 1/b + 1/c)
C 0 = (2/S) (1/a + 1/b + 1/c)
D (1/V) = (2/S) (1/a – 1/b – 1/c)
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