It is currently 18 Jan 2018, 06:16

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Two circular road signs are to be painted yellow. If the rad

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

Hide Tags

Manager
Manager
avatar
Joined: 02 Sep 2012
Posts: 244

Kudos [?]: 237 [0], given: 99

Location: United States
Concentration: Entrepreneurship, Finance
GMAT Date: 07-25-2013
GPA: 3.83
WE: Architecture (Computer Hardware)
Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 19 Jun 2013, 06:48
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

76% (00:31) correct 24% (00:22) wrong based on 223 sessions

HideShow timer Statistics

Two circular road signs are to be painted yellow. If the radius of the larger sign is twice that of the smaller sign, how many times more paint is needed to paint the larger sign (assuming that a given amount of paint covers the same area on both signs)?

A. 2
B. 3
C. 4
D. 3 /2
E. 3/5
[Reveal] Spoiler: OA

_________________

"Giving kudos" is a decent way to say "Thanks" and motivate contributors. Please use them, it won't cost you anything

Kudos [?]: 237 [0], given: 99

Director
Director
User avatar
Status: My Thread Master Bschool Threads-->Krannert(Purdue),WP Carey(Arizona),Foster(Uwashngton)
Joined: 27 Jun 2011
Posts: 877

Kudos [?]: 247 [0], given: 57

GMAT ToolKit User Reviews Badge
Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 19 Jun 2013, 08:33
1
This post was
BOOKMARKED
Let the radius of smaller circle be r

Let the radius of bigger circle be 2r

Now if the to complete the bigger circle the entire diameter will be 4 times that of the smaller circle. hence its 4.
_________________

General GMAT useful links-->

Indian Bschools Accepting Gmat | My Gmat Daily Diary | All Gmat Practice CAT's | MBA Ranking 2013 | How to Convert Indian GPA/ Percentage to US 4 pt. GPA scale | GMAT MATH BOOK in downloadable PDF format| POWERSCORE CRITICAL REASONING BIBLE - FULL CHAPTER NOTES | Result correlation between GMAT and GMAT Club's Tests | Best GMAT Stories - Period!

More useful links-->

GMAT Prep Software Analysis and What If Scenarios| GMAT and MBA 101|Everything You Need to Prepare for the GMAT|New to the GMAT Club? <START HERE>|GMAT ToolKit: iPhone/iPod/iPad/Android application|

Verbal Treasure Hunt-->

"Ultimate" Study Plan for Verbal on the GMAT|Books to Read (Improve Verbal Score and Enjoy a Good Read)|Best Verbal GMAT Books 2012|Carcass Best EXTERNAL resources to tackle the GMAT Verbal Section|Ultimate GMAT Grammar Book from GC club [Free Download]|Ultimate Sentence Correction Encyclopedia|Souvik's The Most Comprehensive Collection Of Everything Official-SC|ALL SC Rules+Official Qs by Experts & Legendary Club Members|Meaning/Clarity SC Question Bank by Carcass_Souvik|Critical Reasoning Shortcuts and Tips|Critical Reasoning Megathread!|The Most Comprehensive Collection Of Everything Official- CR|GMAT Club's Reading Comprehension Strategy Guide|The Most Comprehensive Collection Of Everything Official- RC|Ultimate Reading Comprehension Encyclopedia|ALL RC Strategy+Official Q by Experts&Legendary Club Members

----
---
--
-


1 KUDOS = 1 THANK


Kick Ass Gmat

Kudos [?]: 247 [0], given: 57

Manager
Manager
avatar
Joined: 02 Sep 2012
Posts: 244

Kudos [?]: 237 [0], given: 99

Location: United States
Concentration: Entrepreneurship, Finance
GMAT Date: 07-25-2013
GPA: 3.83
WE: Architecture (Computer Hardware)
Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 19 Jun 2013, 08:42
Here dont we need to find the circumference of the circle..Why we need to calculate the area?pls clarify?
_________________

"Giving kudos" is a decent way to say "Thanks" and motivate contributors. Please use them, it won't cost you anything

Kudos [?]: 237 [0], given: 99

2 KUDOS received
Director
Director
User avatar
Status: My Thread Master Bschool Threads-->Krannert(Purdue),WP Carey(Arizona),Foster(Uwashngton)
Joined: 27 Jun 2011
Posts: 877

Kudos [?]: 247 [2], given: 57

GMAT ToolKit User Reviews Badge
Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 19 Jun 2013, 08:52
2
This post received
KUDOS
skamal7 wrote:
Here dont we need to find the circumference of the circle..Why we need to calculate the area?pls clarify?


Two circular road signs are to be painted yellow. If the radius of the larger sign is twice that of the smaller sign, how many times more paint is needed to paint the larger sign (assuming that a given amount of paint covers the same area on both signs)

How many times more paint need means to cover the entire area, thus we just need to know area.
_________________

General GMAT useful links-->

Indian Bschools Accepting Gmat | My Gmat Daily Diary | All Gmat Practice CAT's | MBA Ranking 2013 | How to Convert Indian GPA/ Percentage to US 4 pt. GPA scale | GMAT MATH BOOK in downloadable PDF format| POWERSCORE CRITICAL REASONING BIBLE - FULL CHAPTER NOTES | Result correlation between GMAT and GMAT Club's Tests | Best GMAT Stories - Period!

More useful links-->

GMAT Prep Software Analysis and What If Scenarios| GMAT and MBA 101|Everything You Need to Prepare for the GMAT|New to the GMAT Club? <START HERE>|GMAT ToolKit: iPhone/iPod/iPad/Android application|

Verbal Treasure Hunt-->

"Ultimate" Study Plan for Verbal on the GMAT|Books to Read (Improve Verbal Score and Enjoy a Good Read)|Best Verbal GMAT Books 2012|Carcass Best EXTERNAL resources to tackle the GMAT Verbal Section|Ultimate GMAT Grammar Book from GC club [Free Download]|Ultimate Sentence Correction Encyclopedia|Souvik's The Most Comprehensive Collection Of Everything Official-SC|ALL SC Rules+Official Qs by Experts & Legendary Club Members|Meaning/Clarity SC Question Bank by Carcass_Souvik|Critical Reasoning Shortcuts and Tips|Critical Reasoning Megathread!|The Most Comprehensive Collection Of Everything Official- CR|GMAT Club's Reading Comprehension Strategy Guide|The Most Comprehensive Collection Of Everything Official- RC|Ultimate Reading Comprehension Encyclopedia|ALL RC Strategy+Official Q by Experts&Legendary Club Members

----
---
--
-


1 KUDOS = 1 THANK


Kick Ass Gmat

Kudos [?]: 247 [2], given: 57

Manager
Manager
avatar
Joined: 02 Sep 2012
Posts: 244

Kudos [?]: 237 [0], given: 99

Location: United States
Concentration: Entrepreneurship, Finance
GMAT Date: 07-25-2013
GPA: 3.83
WE: Architecture (Computer Hardware)
Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 19 Jun 2013, 08:56
thanks!it helped!
_________________

"Giving kudos" is a decent way to say "Thanks" and motivate contributors. Please use them, it won't cost you anything

Kudos [?]: 237 [0], given: 99

Intern
Intern
avatar
Joined: 12 Feb 2013
Posts: 21

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

Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 08 Jun 2015, 09:19
Dear skamal

You see you need to understand the difference between circumference and area visually first.
if you draw a circle on paper then:-
the boundary of circle called circumference . it formula is 2*pie*radius

the space covered inside the closed boundary and also the space covered by the drawing of boundary(how so ever small it is) is called area..

Now you need to draw sign.
Unless stated otherwise, you can safely assume that you draw fully filled circle and not a empty circle.

Hope it helps
Kudos please if you like it. :)

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

Intern
Intern
avatar
Joined: 04 May 2014
Posts: 30

Kudos [?]: 22 [0], given: 13

Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 08 Jun 2015, 09:48
In this case we want to find how much more paint is needed for the larger sign.

We need to use the formula of calculating the area to get our answer, this is
r^2 * pi

r(larger sign) = r(smaller sign) * 2

So plugging that into the formula gives us

(r(smaller sign) * 2 ) ^ 2 * pi =
r(smaller sign) * 4 * pi

Hence we need 4 times more paint for the larger sign than the smaller sign.

Answer C

Kudos [?]: 22 [0], given: 13

Manager
Manager
avatar
B
Joined: 02 Jul 2016
Posts: 95

Kudos [?]: 3 [0], given: 9

Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 05 Jan 2018, 22:53
prateekbhatt wrote:
Let the radius of smaller circle be r

Let the radius of bigger circle be 2r

Now if the to complete the bigger circle the entire diameter will be 4 times that of the smaller circle. hence its 4.


Hi,
I also followed the same approach but since in the question it was asked that how many times more paint is needed to paint the larger sign..
I subtracted the larger circle with that of the smaller circle. so the answer I got was 4-1 =3.

I feel for the answer to be 4 the question, the word more should have been omitted would have been something like
the paint on the larger cirlce would be how many times that of the smaller circle

Can somebody clear this doubt?

Kudos [?]: 3 [0], given: 9

Intern
Intern
avatar
B
Joined: 11 Apr 2014
Posts: 10

Kudos [?]: [0], given: 31

Re: Two circular road signs are to be painted yellow. If the rad [#permalink]

Show Tags

New post 17 Jan 2018, 12:02
suramya26 wrote:
prateekbhatt wrote:
Let the radius of smaller circle be r

Let the radius of bigger circle be 2r

Now if the to complete the bigger circle the entire diameter will be 4 times that of the smaller circle. hence its 4.


Hi,
I also followed the same approach but since in the question it was asked that how many times more paint is needed to paint the larger sign..
I subtracted the larger circle with that of the smaller circle. so the answer I got was 4-1 =3.

I feel for the answer to be 4 the question, the word more should have been omitted would have been something like
the paint on the larger cirlce would be how many times that of the smaller circle

Can somebody clear this doubt?



Hi I have the same doubt as well. Can some body please explain why the answer is not 3.

Kudos [?]: [0], given: 31

Re: Two circular road signs are to be painted yellow. If the rad   [#permalink] 17 Jan 2018, 12:02
Display posts from previous: Sort by

Two circular road signs are to be painted yellow. If the rad

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


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.