GMAT Problem Solving
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Source: Manhattan
Level: 3
Four concentric circles share the same center. The smallest circle has a radius of 1 inch. For n greater than 1, the area of the nth smallest circle in square inches, 
, is given by 
What is the sum of the areas of the four circles, divided by the sum of their circumferences, in inches?
- A 1
- B
- C 2
- D
- E 3