NEW HERE? LEARN MORE
closeclose
Last visit was: 23 Apr 2024, 12:27 It is currently 23 Apr 2024, 12:27
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

A wheel that has a radius of 24 rotates 270 degrees. How

User avatar
getzgetzu
Manager
Manager
Joined: 08 Aug 2005
Posts: 216
Own Kudos [?]: 355 [0]
Given Kudos: 0
Send PM
A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   05 May 2006, 23:11
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?
[/b]



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
Professor
Director
Director
Joined: 29 Dec 2005
Posts: 566
Own Kudos [?]: 176 [0]
Given Kudos: 0
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   Updated on: 17 May 2006, 20:25
getzgetzu wrote:
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?

a correction:

= (270/360) 2 pi (24)
= 36 pi

i should take a break for at least a week.....

Originally posted by Professor on 17 May 2006, 18:35.
Last edited by Professor on 17 May 2006, 20:25, edited 1 time in total.
User avatar
Natalya Khimich
Manager
Manager
Joined: 13 Aug 2005
Posts: 57
Own Kudos [?]: 3 [0]
Given Kudos: 0
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   17 May 2006, 20:17
36Pi.

2*pi*24*3/4=36*pi
User avatar
ywilfred
SVP
SVP
Joined: 07 Jul 2004
Posts: 2004
Own Kudos [?]: 1899 [0]
Given Kudos: 0
Location: Singapore
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   17 May 2006, 20:23
Diameter = pi * 24* 2 = 48pi

This is equivalent to 360 degress rotation.

So 270 degrees will give you 270/360 * 48pi = 36pi
User avatar
ywilfred
SVP
SVP
Joined: 07 Jul 2004
Posts: 2004
Own Kudos [?]: 1899 [0]
Given Kudos: 0
Location: Singapore
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   17 May 2006, 20:24
Professor wrote:
getzgetzu wrote:
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?


= (270/360) pi (24)^2
= (3) pi (24x6)
= 432 pi


Prof, you've gone for area instead of diameter :lol:
User avatar
Professor
Director
Director
Joined: 29 Dec 2005
Posts: 566
Own Kudos [?]: 176 [0]
Given Kudos: 0
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   Updated on: 18 May 2006, 05:14
ywilfred wrote:
Professor wrote:
getzgetzu wrote:
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?


= (270/360) pi (24)^2
= (3) pi (24x6)
= 432 pi


Prof, you've gone for area instead of diameter :lol:


i was wonding why people make mistakes. now i realize why i make mistakes..

yes i went after area instead of perimeter. :wink: :wink: :wink:

Originally posted by Professor on 17 May 2006, 20:28.
Last edited by Professor on 18 May 2006, 05:14, edited 1 time in total.
User avatar
gmatmba
Director
Director
Joined: 16 Aug 2005
Posts: 518
Own Kudos [?]: 112 [0]
Given Kudos: 0
Location: France
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   17 May 2006, 20:36
yea 36 pi looks good
User avatar
jaynayak
Director
Director
Joined: 30 Mar 2006
Posts: 896
Own Kudos [?]: 593 [0]
Given Kudos: 0
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   19 May 2006, 01:43
circumference - 2piR = 48pi
therefore the wheel moves 48pi in 360 deg
Hence it will move 270/360 * 48pi = 36 pi in 270 deg
User avatar
remgeo
Senior Manager
Senior Manager
Joined: 24 Oct 2005
Posts: 267
Own Kudos [?]: 38 [0]
Given Kudos: 0
Location: London
Send PM
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink] New post   19 May 2006, 02:31
For 1 rotation ie. 360 degrees, the wheel moves 2*pi*r .
For 270 degrees it moves (270*48*pi)/360 = 36 pi



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
gmatclubot
Re: A wheel that has a radius of 24 rotates 270 degrees. How [#permalink]
19 May 2006, 02:31
Moderator:
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions