It is currently 22 Feb 2018, 22:53

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the area of the region AOB shaded shown as above?

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

Hide Tags

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 4904
GPA: 3.82
What is the area of the region AOB shaded shown as above? [#permalink]

Show Tags

08 May 2017, 02:04
Expert's post
1
This post was
BOOKMARKED
00:00

Difficulty:

45% (medium)

Question Stats:

63% (00:47) correct 37% (01:07) wrong based on 68 sessions

HideShow timer Statistics

Attachment:

5.8.png [ 4.21 KiB | Viewed 641 times ]

What is the area of the region AOB shaded shown as above?

1) $$∠AOB=120^o$$
2) $$AB=50$$
[Reveal] Spoiler: OA

_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 4904
GPA: 3.82
Re: What is the area of the region AOB shaded shown as above? [#permalink]

Show Tags

10 May 2017, 00:28
==> In the original condition, you need to find the radius of the circle and the central angle, so there are 2 variable. In order to match the number of variables to the number of equations, there must be 2 equations. Since there is 1 for con 1) and 1 for con 2), C is most likely to be the answer.
By solving con 1) and con 2), the answer is C.

Answer: C
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Intern
Joined: 25 Dec 2016
Posts: 19
Re: What is the area of the region AOB shaded shown as above? [#permalink]

Show Tags

10 May 2017, 09:13
Can you let me know how did you solve this question.
How you come to know O is center of the circle.
I thought answer is E
Intern
Joined: 15 Dec 2016
Posts: 15
Location: India
Concentration: Finance, Marketing
WE: Supply Chain Management (Energy and Utilities)
Re: What is the area of the region AOB shaded shown as above? [#permalink]

Show Tags

10 May 2017, 09:30
1
This post received
KUDOS
1. Angle is 120°, however we would need the radius and something to find the area of triangle. So this statement is insufficient.
2. Length of the chord is given here, however this statement alone is insufficient.

Combining both we would get the radius and subsequently the area of triangle.

So answer should be C

Sent from my MI 5 using GMAT Club Forum mobile app
Senior Manager
Joined: 29 Oct 2016
Posts: 268
Concentration: Finance, Economics
GMAT 1: 620 Q50 V24
GRE 1: 314 Q167 V147
Re: What is the area of the region AOB shaded shown as above? [#permalink]

Show Tags

20 May 2017, 01:46
My take is E
It has to be explicitly mentioned that O is the center of the circle !!!!!!
Re: What is the area of the region AOB shaded shown as above?   [#permalink] 20 May 2017, 01:46
Display posts from previous: Sort by

What is the area of the region AOB shaded shown as above?

 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®.