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

It is currently 19 Aug 2014, 22:52

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 volume of a certain rectangular solid? (1) Two

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1447
Followers: 2

Kudos [?]: 16 [0], given: 0

GMAT Tests User
What is the volume of a certain rectangular solid? (1) Two [#permalink] New post 09 May 2005, 18:03
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the volume of a certain rectangular solid?

(1) Two adjacent faces of the solid have areas 15 and 24, respectively.
(2) Each of two opposite faces of the solid has area 40.


What am I missing here ?
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1447
Followers: 2

Kudos [?]: 16 [0], given: 0

GMAT Tests User
 [#permalink] New post 09 May 2005, 18:58
It is but isn't "B" suff.....we know areas of all the faces and can calculate the volume. Wording of B seems to be lil off. What u make out of "B" ?
VP
VP
User avatar
Joined: 25 Nov 2004
Posts: 1498
Followers: 6

Kudos [?]: 27 [0], given: 0

GMAT Tests User
 [#permalink] New post 09 May 2005, 19:46
banerjeea_98 wrote:
It is but isn't "B" suff.....we know areas of all the faces and can calculate the volume. Wording of B seems to be lil off. What u make out of "B" ?


from B, how do you know the area of all the faces? you might be confused with "Each of two opposite faces of the solid has area 40". i do not think that it means all opposite faces. suppose we have the following faces:
front=a
back=b
right = c
left=d
up=e
down/bottom=f

i think "Each of two opposite faces of the solid has area 40" = either a and b or c and d or e and f have the same area.
hope helps.
Senior Manager
Senior Manager
avatar
Joined: 15 Mar 2005
Posts: 425
Location: Phoenix
Followers: 1

Kudos [?]: 9 [0], given: 0

GMAT Tests User
 [#permalink] New post 10 May 2005, 00:41
banerjeea_98 wrote:
It is but isn't "B" suff.....we know areas of all the faces and can calculate the volume. Wording of B seems to be lil off. What u make out of "B" ?



I think MA is right Baner.

Guess you're thinking that "all" the surfaces ("each" opposite pair of surfaces) have an area 40 - which makes the rectangular solid collapse to a cuboid.

I just tried solving the prob:
if length = l, breadth = b and height = h,

(A) lxb = 15, lxh= 24.
Two equations, three variables. Unsolvable.

(B) Two opposite surfaces have area 40 each.
Thus, either, lxb = 40, or hxb = 40 or lxh = 40.
One equation, three variables. Unsolvable.

Combining A and B,
Therefore, 3 equations, three variables. Solvable.
_________________

Who says elephants can't dance?

VP
VP
User avatar
Joined: 13 Jun 2004
Posts: 1128
Location: London, UK
Schools: Tuck'08
Followers: 6

Kudos [?]: 22 [0], given: 0

GMAT Tests User
 [#permalink] New post 10 May 2005, 01:51
At the begining I wanted to say A

We know that the two adjacent faces of the solid have areas 15 and 24, respectively. The faces are ajacent which means that they have a side in common, the best way is to find thefactors of both areas :
15 = 3*5 and 24=3*8 so logically one side is 3, another is 5 and the last one is 8.

However I realized later that I didn't take into account the possibility to get some decimal numbers.... :oops: :?
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1447
Followers: 2

Kudos [?]: 16 [0], given: 0

GMAT Tests User
 [#permalink] New post 10 May 2005, 05:43
yeah...OA is "C"....state 2 threw me off. I still think "B" is poorly worded.
  [#permalink] 10 May 2005, 05:43
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic What is the volume of a certain rectangular solid? 1) two GHIBI 4 27 Jan 2008, 00:13
What is the volume of a certain rectangular solid? (1) Two Sam Kana 4 21 Jul 2007, 20:02
What is the volume of a certain rectangular solid? (1) Two SimaQ 4 09 Feb 2007, 11:06
What is the volume of a certain rectangular solid? (1) Two joemama142000 4 04 Dec 2005, 12:31
What is the volume of a certain rectangular solid? (1) Two gayathri 6 29 Nov 2004, 16:54
Display posts from previous: Sort by

What is the volume of a certain rectangular solid? (1) Two

  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®.