Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 21 May 2013, 22:43
Customize  |  Hide

Search
Register
New posts
Unanswered

Geometry 7

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 19 Aug 2009
Posts: 87
Followers: 1

Kudos [?]: 11 [0], given: 46

Geometry 7 [#permalink] New post 02 Oct 2009, 09:57
00:00

Question Stats:

100% (03:06) correct 0% (00:00) wrong based on 0 sessions
Diagram not to scale
Q.
ABCD is a trapezium in which AB is parallel to DC, AD = BC, AB= 6 cm, AB=EF and DF=EC. If the two lines AF and BE are drawn so that area of ABEF is half of ABCD.
Find DF/CD.
1. 1/4
2. 1/3
3. 2/5
4.1/6
Attachments

geometry 7.JPG
geometry 7.JPG [ 10.89 KiB | Viewed 500 times ]

Manager
Manager
Joined: 12 Oct 2009
Posts: 119
Followers: 2

Kudos [?]: 10 [0], given: 3

Re: Geometry 7 [#permalink] New post 13 Oct 2009, 16:00
virtualanimosity wrote:
Diagram not to scale
Q.
ABCD is a trapezium in which AB is parallel to DC, AD = BC, AB= 6 cm, AB=EF and DF=EC. If the two lines AF and BE are drawn so that area of ABEF is half of ABCD.
Find DF/CD.
1. 1/4
2. 1/3
3. 2/5
4.1/6


1/3
as per diagram and info AB=EF=6 cm and DF = EC = x(say)
then area of ABEF is 6*h (hieght) = 1/2 [1/2*( 6+6+2x)*h]
we get x= 6 so DF/ CD = 6/18 =1/3
Senior Manager
Senior Manager
User avatar
Affiliations: PMP
Joined: 13 Oct 2009
Posts: 319
Followers: 2

Kudos [?]: 76 [0], given: 37

GMAT Tests User
Re: Geometry 7 [#permalink] New post 13 Oct 2009, 17:31
My Ans. is 2

1/2 (6+CD)h = 2* 1/2 (6+6)h

solving for CD, we get 18, since EF=6 and DF = EC , DF, EC must be 6 each.

hence DF/CD=6/18=1/3

matrix is always ahead of me and almost always right :) :)
_________________

Thanks, Sri
-------------------------------
keep uppp...ing the tempo...

Press +1 Kudos, if you think my post gave u a tiny tip

Manager
Manager
Joined: 12 Oct 2009
Posts: 119
Followers: 2

Kudos [?]: 10 [0], given: 3

Re: Geometry 7 [#permalink] New post 13 Oct 2009, 22:42
srini123 wrote:
My Ans. is 2

1/2 (6+CD)h = 2* 1/2 (6+6)h

solving for CD, we get 18, since EF=6 and DF = EC , DF, EC must be 6 each.

hence DF/CD=6/18=1/3

matrix is always ahead of me and almost always right :) :)

:lol:
Manager
Manager
User avatar
Joined: 18 Jul 2009
Posts: 174
Location: India
Schools: South Asian B-schools
Followers: 2

Kudos [?]: 39 [0], given: 37

GMAT Tests User
Re: Geometry 7 [#permalink] New post 14 Oct 2009, 02:35
AB=EF=6
DF=EC=x cm

Area of ABCD = 2 ( Area of ABEF )
1/2*(6+6+x+x) = 2 ( 1/2*12*h )
x=6
thus DF/CD = 6/18 = 1/3
_________________

Bhushan S.
If you like my post....Consider it for Kudos :-D

Re: Geometry 7   [#permalink] 14 Oct 2009, 02:35
    Similar topics Author Replies Last post
Similar
Topics:
 New posts geometry rich28 1 21 Aug 2003, 10:47
Popular new posts Geometry crackgmat750 10 02 Oct 2004, 23:06
Popular new posts geometry mirhaque 13 21 Feb 2005, 16:56
New posts Geometry Macedon 3 12 Oct 2005, 06:00
New posts DS - Geometry ETS Question #7 ucramitpatel 1 17 Nov 2006, 10:35
Display posts from previous: Sort by

Geometry 7

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com