It is currently 15 Nov 2018, 06:53
My Tests

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

A circle with radius

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 4876
Followers: 74

Kudos [?]: 973 [0], given: 4479

CAT Tests
A circle with radius [#permalink] New post 19 Oct 2017, 14:56
Expert's post
00:00

Question Stats:

100% (00:18) correct 0% (00:00) wrong based on 15 sessions


A circle with radius \(\frac{4}{\sqrt{\pi}}\) has the same area as a particular square.

Quantity A
Quantity B
\(9\pi\)
The area of the square if each side were
increased by 1


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________

Get the 2 FREE GREPrepclub Tests

Intern
Intern
Joined: 23 Sep 2017
Posts: 18
Followers: 0

Kudos [?]: 7 [0], given: 6

Re: A circle with radius [#permalink] New post 21 Oct 2017, 04:10
Please explain how choice a is correct? n is not known in this question.
1 KUDOS received
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 4876
Followers: 74

Kudos [?]: 973 [1] , given: 4479

CAT Tests
Re: A circle with radius [#permalink] New post 22 Oct 2017, 14:42
1
This post received
KUDOS
Expert's post
The circle with radius \(\frac{4}{\sqrt{n}}\) is equal to the area of a square.

Use the circle area formula

\(A = \pi ( \frac{4}{\sqrt{n}}) ^2\)

A = 16

Hence the area of the square is 16 and a single side is 4.

Now QB says if the side is increased by one. Therefore, one side is 5. From this the area is 25.

But QA is \(9 \pi\) that is more than 27 ( 9 * 3.14).

The answer is A
_________________

Get the 2 FREE GREPrepclub Tests

1 KUDOS received
Intern
Intern
Joined: 23 Sep 2017
Posts: 18
Followers: 0

Kudos [?]: 7 [1] , given: 6

Re: A circle with radius [#permalink] New post 22 Oct 2017, 22:41
1
This post received
KUDOS
Carcass wrote:
The circle with radius \(\frac{4}{\sqrt{n}}\) is equal to the area of a square.

Use the circle area formula

\(A = \pi ( \frac{4}{\sqrt{n}}) ^2\)

A = 16

Hence the area of the square is 16 and a single side is 4.

Now QB says if the side is increased by one. Therefore, one side is 5. From this the area is 25.

But QA is \(9 \pi\) that is more than 27 ( 9 * 3.14).

The answer is A


Hi Carcass,

Thanks.

Denominator is \sqrt{n}, not pi. Please change the question.
2 KUDOS received
Director
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 1

Kudos [?]: 327 [2] , given: 66

Re: A circle with radius [#permalink] New post 23 Oct 2017, 02:05
2
This post received
KUDOS
AR15J wrote:
Carcass wrote:
The circle with radius \(\frac{4}{\sqrt{n}}\) is equal to the area of a square.

Use the circle area formula

\(A = \pi ( \frac{4}{\sqrt{n}}) ^2\)

A = 16

Hence the area of the square is 16 and a single side is 4.

Now QB says if the side is increased by one. Therefore, one side is 5. From this the area is 25.

But QA is \(9 \pi\) that is more than 27 ( 9 * 3.14).

The answer is A


Hi Carcass,

Thanks.

Denominator is \sqrt{n}, not pi. Please change the question.


Question edited consistently with the source
Re: A circle with radius   [#permalink] 23 Oct 2017, 02:05
Display posts from previous: Sort by

A circle with radius

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.