| View previous topic :: View next topic |
| Author |
Message |
ritula
Rising GMAT Star
Joined: 10 Aug 2008
Posts: 81
Thanks given: 4
Thanked 0 times in 0 posts
Test Date: 27th September'2008
Target GMAT Score: 740
|
 Posted: Fri Sep 05, 2008 1:21 am Post subject: secants |
 |
|
TSI and TPK are two secants drawn to the circle where T is a point outside the circle. What is the length of PK?
(1) TS = PK
(2) SI = 5 cms.
_________________
Philosophers have interpreted world in various ways, the point is to change it! |
|
| Back to top |
|
 |
|
|
mayur00
Rising GMAT Star
Joined: 23 Jun 2008
Posts: 30
Thanks given: 0
Thanked 2 times in 2 posts
|
| Posted: Fri Sep 05, 2008 2:12 pm Post subject: |
|
|
For secants from a common point:
TK*TP=TS*TI
Since, TK=TP + PK
also, TI=TS + SI
Therefore, TP ( TP + PK) = TS ( TS + SI)
1. TS = PK
Insufficient since we still have 3 unknowns.
2. SI=5
Insufficient, 3 unknowns
I tried simplifying the equation but couldn't get a solution even after combining statements 1 and 2. I end up with one equation with two unknowns.
Therefore, unless I am missing something answer should be E. |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
|
|
"GMAT" and other GMAC™ trademarks are registered trademarks of the Graduate Management Admission Council™. The Graduate Management Admission Council™ does not endorse, nor is it affiliated in any way with the owner or any content on this website. The opinions expressed here are solely those of the author or those of the members of this website. Copyright © 2008 BTG Test Prep, LLC. Powered by phpBB © 2001, 2005 phpBB Group.
|
|
