Forgot Password?
 
Links
About Arcadia LSAT Shorthand NotationArcadia Prep's GMAT CourseArcadia Prep's LSAT CourseArcadia Prep's SAT CourseArcadia Prep's GRE CourseThe Simply Brilliant GMAT AppAbout the MCATMCAT Physical and Biological SciencesAbout Arcadia Prep's MCAT CourseTerms of SaleTerms of UseAbout Arcadia Apps
iPhone App Store
GGRE Prep App
GMAT Prep App
LSAT Prep App
LSAT Prep
SAT Prep App
 
Back to Questions

In the figure shown, the radius of the larger circle is twice that of the ... ...

In the figure shown, the radius of the larger circle is twice that of the smaller circle.  If the circles are concentric, what is the ratio of the shaded region’s area to the area of the smaller circle?
(A) 10:1
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set F - Geometry

Collapse All Subordinate Threads
Image Not Available
 
Replies to This Thread: 0 | ----
 
Posted: 12/20/2012 10:03
What if you substituted for radius 4 for the larger circle and radius 2 for the smaller ? You get 8:1 ?!?
Contributor
 
Replies to This Thread: 0 | ----
 
Posted: 12/21/2012 16:32
Abdulla, the shaded area = (Area of the Large circle - Area of the Smaller circle). Using your numbers, it will be = π16 - π4 = 12π. The inner circle's area = 4π. The ratio between the two = 12 : 4 or 3:1.
Arcadia Prep © 2012.
Contact Arcadia  |  Terms of Use  |  Terms of Sale  |  Change Log-in Info