Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 19 Jun 2013, 08:04

# Cube Volume Question/Triange Area

Author Message
TAGS:
Intern
Joined: 03 Jul 2009
Posts: 4
Followers: 0

Kudos [?]: 0 [0], given: 0

Cube Volume Question/Triange Area [#permalink]  03 Jul 2009, 10:49
00:00

Question Stats:

45% (01:50) correct 54% (02:33) wrong based on 11 sessions
If the volume of a cube is x cubic feet and the total surface area of the cube is x square feet,then what is the total length, in feet, of all the cube’s edges?

Can someone please explain the solution? I am not able to make sense of the question.

a) 24
b) 60
c) 72
d) 120
e) 144

same goes for the below one too.

If the area of an equilateral triangle is x square meters and the perimeter is x meters, then what is the length of one side of the triangle in meters?

a) 6
b) 8
c) 4 (root 2)
d) 2 (root 3)
4) 4 (root 3)
CEO
Joined: 17 Nov 2007
Posts: 3608
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 240

Kudos [?]: 1322 [1] , given: 347

Re: Cube Volume Question/Triange Area [#permalink]  03 Jul 2009, 11:36
1
KUDOS

1) V=a^3; S=6*a^2; V=S=a^3=6a^2 ---> a=6.
There are 12 edges in a cube. So, L=12*6=72
C

2) S=sqrt(3)/4*a^2; P=3*a; S=P=sqrt(3)/4*a^2=3a ---> a=4*sqrt(3)
E
_________________

NEW! GMAT ToolKit 2 (iOS) / GMAT ToolKit (Android) - The must have GMAT prep app | PrepGame

Intern
Joined: 03 Jul 2009
Posts: 4
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: Cube Volume Question/Triange Area [#permalink]  03 Jul 2009, 12:34
walker wrote:

1) V=a^3; S=6*a^2; V=S=a^3=6a^2 ---> a=6.
There are 12 edges in a cube. So, L=12*6=72
C

2) S=sqrt(3)/4*a^2; P=3*a; S=P=sqrt(3)/4*a^2=3a ---> a=4*sqrt(3)
E

Thanks a lot for the reply.
Re: Cube Volume Question/Triange Area   [#permalink] 03 Jul 2009, 12:34
Similar topics Replies Last post
Similar
Topics:
A cube has a surface area of 150 sq ft. What is its volume, 2 17 Apr 2005, 18:21
What is the volume of a cube? 1. Surface area is 600. 2. 6 11 Dec 2005, 04:17
What is the volume of cube C ? 1. Total surface area os C is 1 02 Feb 2008, 17:10
What is the volume of the cube ? (1) The surface area of the 1 05 Nov 2008, 22:19
Volume of Cube 2 26 Oct 2010, 09:07
Display posts from previous: Sort by