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

 It is currently 22 Feb 2019, 16:57

### 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

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

## Events & Promotions

###### Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
• ### Free GMAT RC Webinar

February 23, 2019

February 23, 2019

07:00 AM PST

09:00 AM PST

Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT
• ### FREE Quant Workshop by e-GMAT!

February 24, 2019

February 24, 2019

07:00 AM PST

09:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.

# What is the area of the above circle?

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1207
Location: India
Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
What is the area of the above circle?  [#permalink]

### Show Tags

13 Oct 2018, 09:25
5
00:00

Difficulty:

85% (hard)

Question Stats:

35% (02:05) correct 65% (02:13) wrong based on 30 sessions

### HideShow timer Statistics

Attachment:

Q2.jpg [ 30.25 KiB | Viewed 404 times ]
What is the area of the above circle?
1) Angle ABC = 90 deg
B) CD = 12

Weekly Quant Quiz #4 Ques 6

_________________
Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1207
Location: India
Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
Re: What is the area of the above circle?  [#permalink]

### Show Tags

13 Oct 2018, 20:09
1
This Question can be easily explained using one of the basic property:

A Unique Circle can be drawn using 3 non-collinear points.

As we need the radius of the circle, we need to find the relative position of points wrt each other.
Let us suppose that point C (0,0)
Statement 1: Points C (0,0), A(15,8), D(0,-k) where k is length of CD
Since all points are not defined , circle is not defined.
NOT SUFFICIENT
Statement 2: Points C (0,0), D(0,-12), point A not defined.
NOT SUFFICIENT

combining Statement 1& 2 , we get
Points are A(15,8) C(0,0) and D(0, -12), hence a unique circle can be drawn and its area can be calculated.
SUFFICIENT.

(Since, It is a DS Question, there is no need to find the exact area, we need to know whether it can be determined uniquely or not)
_________________
##### General Discussion
Manager
Joined: 05 Jul 2018
Posts: 56
Location: India
Concentration: General Management, Technology
GRE 1: Q162 V149
GPA: 3.6
WE: Information Technology (Consulting)
Re: What is the area of the above circle?  [#permalink]

### Show Tags

13 Oct 2018, 09:43
Extended CB will touch the circle on point E(let us assume). Now DE has to be the diameter of the Circle. To be able to find length of DE we must be able to find the length of BE first. Now let us see if Either of the statements help us in finding the length of BE(where E is the point where extended CB touches the other end of circle).

1)Angle ABC = 90 deg . This only gives the length of AC the hypotenuse of triangle ABC. Hence NOT SUFFICIENT
2) CD = 12 . This info does not help us in finding the length of BE. Hence this too is NOT SUFFICIENT

Hence, the answer must be E
_________________

Appreciate any KUDOS given !
MY MBA RESOURCES:

RC Moderator
Joined: 24 Aug 2016
Posts: 681
Concentration: Entrepreneurship, Operations
GMAT 1: 630 Q48 V28
GMAT 2: 540 Q49 V16
Re: What is the area of the above circle?  [#permalink]

### Show Tags

13 Oct 2018, 10:04
1) Angle ABC = 90 deg.... NS .... we only get AC=17... not the radius or dia
2) CD = 12 .... NS .... we only get AD=25... not the radius or dia

Ans E
_________________

Please let me know if I am going in wrong direction.
Thanks in appreciation.

Re: What is the area of the above circle?   [#permalink] 13 Oct 2018, 10:04
Display posts from previous: Sort by

# What is the area of the above circle?

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.