Question

if V is the volume of a cuboid of dimensions x,y,z and A is its total surface area, then A/V

Answer 1

V = xyz
A = 2(xy+yz+xz)

Then , A/V = 2(xy+yz+xz) / xyz

A/V = 2(1/x +1/y+1/z)

In Photo Answer is - (C)

Answer 2

Option C is right !!!
Hope it helps you !!!