A cube is defined by only one value which is the length of its side. The internal angles always remain 90. So once you have the side, all other parameters of the cube inluding surface areas, volume, diagonals etc can be derived or alternatively once you have any of the other parameters the side can be derived. Straight D 5 sec answer.

_________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

http://www.manhattangmat.com/blog/index ... nprep-com/ - This is worth its weight in gold

Economist GMAT Test - 730, Q50, V41 Aug 9th, 2013

Manhattan GMAT Test - 670, Q45, V36 Aug 11th, 2013

Manhattan GMAT Test - 680, Q47, V36 Aug 17th, 2013

GmatPrep CAT 1 - 770, Q50, V44 Aug 24th, 2013

Manhattan GMAT Test - 690, Q45, V39 Aug 30th, 2013

Manhattan GMAT Test - 710, Q48, V39 Sep 13th, 2013

GmatPrep CAT 2 - 740, Q49, V41 Oct 6th, 2013

GMAT - 770, Q50, V44, Oct 7th, 2013

My Debrief - from-the-ashes-thou-shall-rise-770-q-50-v-44-awa-5-ir-162299.html#p1284542