Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 0612:30 AM EDT
-01:30 AM EDT
GMAT 615 to 715 in Just 15 Days! Riya’s 100-pt Improvement Strategy
May 0608:30 AM PDT
-09:30 AM PDT
In Episode 3 of our GMAT Ninja Critical Reasoning series, we tackle Discrepancy, Paradox, and Explain an Oddity questions. You know the feeling: the passage gives you two facts that seem completely contradictory....- May 05
10:00 AM PDT
-11:00 AM PDT
GMAT Inequalities is a high-frequency topic in GMAT Quant, but many students struggle because the concepts behave differently from standard algebra. Understanding the right rules, patterns, and edge cases can significantly improve both speed and accuracy. 
May 0701:00 AM EDT
-02:00 AM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and.....- May 08
08:00 AM PDT
-08:30 AM PDT
Join the special YouTube live-stream for selecting the winners of GMAT Club MBA Scholarships sponsored by Juno live. Watch who gets these coveted MBA scholarships offered by GMAT Club and Juno. 
May 0808:00 PM PDT
-09:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
14 Sep 2018, 02:17
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
38% (02:43) correct
62%
(02:58)
wrong
based on 39
sessions
History
Date
Time
Result
Not Attempted Yet
If the length of AB is 12 and the radius of the circle is \(6\sqrt{3}\), what is the length of the arc ACB?
A. 24π
B. 18π
C. 16π
D. 12π
E. 8π
Attachment:
image039.jpg [ 1.84 KiB | Viewed 3134 times ]
14 Sep 2018, 04:56
Kudos
Bookmarks
Bunuel
rahulkashyap
We are not required to know trigonometry, so there must be some other way..
So radius=6√3
Circumference =2π*6√3=12π√3=20.8π
So the size of a minor arc can at the max be closer to half circle ~10.4π
But here we are talking of a chord of 12 where the diameter is 12√3π
So answer<10.4π
Only E is possible
But it will not be 6√2 because then the triangle being formed by the centre and the endpoint of chord AB will be isosceles right angled triangle with sides 6√2:6√2:12
Ratio of 1:1:√2 thus 45:45:90
Then arc ACB will be 2πr*90/360=π*6√2*1/2=3√2π
Not in the choices, so radius cannot be 6√2
General Discussion
14 Sep 2018, 02:35
Kudos
Bookmarks
chetan2u, assuming we have the missing number for this diameter, what exactly would be the theory behind the working? would we have to use parallel lines for this?
