Geometry related question : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 16 Jan 2017, 14:17

### 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

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

# Geometry related question

Author Message
Manager
Joined: 05 May 2005
Posts: 80
Followers: 1

Kudos [?]: 40 [0], given: 0

### Show Tags

13 May 2007, 21:03
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

How do you solve?

A circular rim 28 inches in diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes x revolutions per second, how many revolutions per minute does the larger rim make in terms of x?

a) 48pi/x b) 75x c) 48x d) 24x e) x/75
Manager
Joined: 02 May 2007
Posts: 152
Followers: 1

Kudos [?]: 5 [0], given: 0

### Show Tags

13 May 2007, 21:49
above720 wrote:
How do you solve?

A circular rim 28 inches in diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes x revolutions per second, how many revolutions per minute does the larger rim make in terms of x?

a) 48pi/x b) 75x c) 48x d) 24x e) x/75

(C) it is

28 * pi * x = 35 * pi * y

=> y = (28 * pi)x/(35 * pi) (revolutions/sec)
=> y = (60 * 28 * pi * x)/(35 * pi) = 48x (revolutions/min)
Senior Manager
Joined: 03 May 2007
Posts: 271
Followers: 1

Kudos [?]: 11 [0], given: 0

### Show Tags

14 May 2007, 05:16
I agree with kirakira

C
14 May 2007, 05:16
Display posts from previous: Sort by