GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 20 Aug 2018, 21:12

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.

Close

Request Expert Reply

Confirm Cancel

If the number of square units in the surface area of a

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Current Student
User avatar
Joined: 11 May 2008
Posts: 551
If the number of square units in the surface area of a  [#permalink]

Show Tags

New post 11 Sep 2008, 21:27
If the number of square units in the surface area of a cylinder with a radius of 6 is 1/2 of the number of cubic units in the cylinder, what is the number of square units in the surface area?

A. 128pi
B. 192pi
C. 216pi
D. 324pi
E. 432pi

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
SVP
SVP
User avatar
Joined: 29 Aug 2007
Posts: 2419
Re: SURFACE AREA  [#permalink]

Show Tags

New post 11 Sep 2008, 21:49
arjtryarjtry wrote:
If the number of square units in the surface area of a cylinder with a radius of 6 is 1/2 of the number of cubic units in the cylinder, what is the number of square units in the surface area?

A. 128pi
B. 192pi
C. 216pi
D. 324pi
E. 432pi


\(1/2 (pi r^2 h)\) = \(2 pi r h + 2 pi r^2)\)
\((pi r^2 h)\) = \(2x2 pi r (h + r)\)
\((r h)\) = \(4 (h + r)\)
rh = 4 (h + r)
6h = 4 (h + 6)
6h - 4h = 24
h = 12

surface area = 2 pi r (h + r) = 2 pi 6 (12+6) = 216 pi

//C//

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Verbal: http://gmatclub.com/forum/new-to-the-verbal-forum-please-read-this-first-77546.html
Math: http://gmatclub.com/forum/new-to-the-math-forum-please-read-this-first-77764.html
Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html


GT

Re: SURFACE AREA &nbs [#permalink] 11 Sep 2008, 21:49
Display posts from previous: Sort by

If the number of square units in the surface area of a

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderator: chetan2u

Events & Promotions

PREV
NEXT


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.