| View previous topic :: View next topic |
| Author |
Message |
magical cook
GMAT Destroyer!
Joined: 30 Jul 2006
Posts: 484
Thanks given: 6
Thanked 1 times in 1 posts
|
 Posted: Tue Aug 28, 2007 11:31 am Post subject: 29-31 |
 |
|
Phobus, one of the satellites of Mars, revolves about Mars at a distance of approximately
5,800 miles from the center of Mars and approximately 3,700 miles from the surface of
Mars. If it is assumed that Mars is spherical and the orbit of Phobus is circular, what is
the approximate circumference, in miles, of Mars at its equator?
A. 2,100π
B. 4,200π
C. 7,400π
D. 9,500π
E. 190,000π |
|
| Back to top |
|
 |
|
|
beny
Really wants to Beat The GMAT!
Joined: 20 Jul 2007
Posts: 211
Thanks given: 0
Thanked 2 times in 2 posts
|
| Posted: Tue Aug 28, 2007 11:47 am Post subject: |
|
|
Radius is 5800-3700 = 2100
2*2100*pi = 4200pi
Answer: B |
|
| Back to top |
|
|
magical cook
GMAT Destroyer!
Joined: 30 Jul 2006
Posts: 484
Thanks given: 6
Thanked 1 times in 1 posts
|
| Posted: Tue Aug 28, 2007 12:11 pm Post subject: |
|
|
Thank you . answere is B.
But I  'm still unable to get how to get radius 5800-3700. 5800 from center and 3700 from surface made me think 5800 + 3700 |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
|
|
"GMAT" and other GMAC™ trademarks are registered trademarks of the Graduate Management Admission Council™. The Graduate Management Admission Council™ does not endorse, nor is it affiliated in any way with the owner or any content on this website. The opinions expressed here are solely those of the author or those of the members of this website. Copyright © 2008 BTG Test Prep, LLC. Powered by phpBB © 2001, 2005 phpBB Group.
|
|
