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## 500 ds test4 #18

This topic has 2 member replies
dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages

#### 500 ds test4 #18

Thu Apr 05, 2007 4:43 pm
Hi,

I thought the answer is E) or C) but turned out to be D)....

I thought even thought the total area is same, the length of each side could be different, and thus the volum could be different.... If the answer is D), that means the cube that has the same area size always have the same volum size too?

. What is the volume of a certain cube?
(1) The sum of the areas of the faces of the cube is 54.
(2) The greatest possible distance between two points on the cube is

dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages
Thu Apr 05, 2007 9:50 pm
Thank you - if cube always has the same length... that will explain !!

jayhawk2001 Community Manager
Joined
28 Jan 2007
Posted:
789 messages
Followed by:
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Thu Apr 05, 2007 9:19 pm
A cube has sides of the same length.

1 - sufficient. 6a^2 = 54. we can hence calculate a^3

2 - sufficient. You don't need to solve this. It is enough to know that
the greatest distance between 2 points can be represented in
terms of side a.

Hence D

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