Scaling Circles

Posted on Categories - GMAT Quant, GRE Quant

The area of circle is , and the area of circle is . What is ratio of the circumference of circle to the circumference of circle . (A) 2.5 : 1      (B) 5 : 2      (C) 5 : 4    (D) 25 : 16      (E) 125 : 1...

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