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

It is currently 27 Dec 2014, 19:48

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the ratio of the surface area of a cube to the surfa

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
SVP
SVP
avatar
Joined: 04 May 2006
Posts: 1937
Schools: CBS, Kellogg
Followers: 19

Kudos [?]: 378 [0], given: 1

Premium Member
What is the ratio of the surface area of a cube to the surfa [#permalink] New post 03 Mar 2008, 23:26
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

48% (01:42) correct 52% (00:42) wrong based on 97 sessions
What is the ratio of the surface area of a cube to the surface area of a rectangular solid identical to the cube in all ways except that its length has been doubled?

A. 1/4
B. 3/8
C. 1/2
D. 3/5
E. 2

OPEN DISCUSSION OF THIS QUESTION IS HERE: what-is-the-ratio-of-the-surface-area-of-a-cube-to-the-surfa-127459.html
[Reveal] Spoiler: OA

Last edited by Bunuel on 27 Mar 2014, 00:08, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to PS forum.
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesGMAT Pill GMAT Discount Codes
Manager
Manager
avatar
Joined: 31 Oct 2007
Posts: 113
Location: Frankfurt, Germany
Followers: 1

Kudos [?]: 25 [0], given: 0

Re: MC1- Q26 [#permalink] New post 05 Mar 2008, 20:41
One side surface area of a cube = x*x = x^2
Total 6 sides = 6x^2

As for the rectangular, Height (H) and Width (W) are same as Cube, x. Only Length = 2x.
L x H = 2x * x = 2x^2 ----> 4 sides = 2x^2 * 4 = 8x^2
W * H = x * x = x^2 ------> 2 sides = x^2 * 2 = 2x^2
Total 6 sides = 8x^2 + 2x^2 = 10x^2

Ratio of cube area to rectangular area = 6x^2 / 10x^2 ----> 6/10 ----> 3/5 (E)
_________________

Jimmy Low, Frankfurt, Germany
Blog: http://mytrainmaster.wordpress.com
GMAT Malaysia: http://gmatmalaysia.blogspot.com

Manager
Manager
User avatar
Joined: 14 Jan 2013
Posts: 157
Concentration: Strategy, Technology
GMAT Date: 08-01-2013
GPA: 3.7
WE: Consulting (Consulting)
Followers: 2

Kudos [?]: 71 [0], given: 29

Re: What is the ratio of the surface area of a cube to the [#permalink] New post 26 Mar 2014, 16:01
Opening this old thread...


Guys,

Can some one draw this for me....

Thanks in adv

~M14
_________________

"Where are my Kudos" ............ Good Question = kudos

"Start enjoying all phases" & all Sections

__________________________________________________________________
http://gmatclub.com/forum/collection-of-articles-on-critical-reasoning-159959.html

percentages-700-800-level-questions-130588.html

700-to-800-level-quant-question-with-detail-soluition-143321.html

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 24776
Followers: 3825

Kudos [?]: 33231 [1] , given: 3754

Re: What is the ratio of the surface area of a cube to the [#permalink] New post 27 Mar 2014, 00:10
1
This post received
KUDOS
Expert's post
Mountain14 wrote:
Opening this old thread...


Guys,

Can some one draw this for me....

Thanks in adv

~M14


What is the ratio of the surface area of a cube to the surface area of a rectangular solid identical to the cube in all ways except that its length has been doubled?

A. 1/4
B. 3/8
C. 1/2
D. 3/5
E. 2

30 second approach:
A cube has 6 faces, suppose each has an area of 1, so surface area of the cube will be 6;

A rectangular solid identical to the cube in all ways except that its length has been doubled is just complicated way of saying that the rectangular solid is built with two cubes, hence it has 4+4+2=10 faces of a little cube (just imagine to cubes put one on another) and thus the surface area of the rectangular solid will be 10;

Ratio: 6/10=3/5.

Answer: D.

OPEN DISCUSSION OF THIS QUESTION IS HERE: what-is-the-ratio-of-the-surface-area-of-a-cube-to-the-surfa-127459.html
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Re: What is the ratio of the surface area of a cube to the   [#permalink] 27 Mar 2014, 00:10
    Similar topics Author Replies Last post
Similar
Topics:
6 Experts publish their posts in the topic What is the ratio of the surface area of a cube to the surfa enigma123 10 12 Feb 2012, 20:33
What is the surface area of the cube ? UtterNonsense 4 26 Jul 2011, 05:42
What is the ratio of the surface area of a cube to the pm4553 1 04 Oct 2008, 06:09
What is the ratio of the surface area of a cube to the trahul4 6 12 Aug 2007, 04:18
Display posts from previous: Sort by

What is the ratio of the surface area of a cube to the surfa

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.