AMC 8 2008 Problem 25

AMC8 2008 年第 25

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Margie's winning art design is shown. The smallest circle has radius 2 inches, with each successive circle's radius increasing by 2 inches. Which of the following is closest to the percent of the design that is black?
下图展示了 Margie 获奖的艺术设计作品。最小的圆的半径为 2 英寸,每个连续圆的半径增加 2 英寸。以下哪项最接近黑色图案占整个图案的百分比?
  1. A.42
  2. B.44
  3. C.46
  4. D.47
  5. E.49

正确答案 · Correct Answer

A

解析 · Solution

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