AMC 8 2011 Problem 13

AMC8 2011 年第 13

面积与周长(综合)★★★☆☆
Two congruent squares, ABCD and PQRS, have side length 15. They overlap to form the 15 by 25 rectangle AQRD shown. What percent of the area of rectangle AQRD is shaded?
和 PQRS 是两个全等的正方形,边长均为 15.它们重合形成一个 15x25 的矩形 AQRD,如图所示。那么阴影部分占了矩形 AQRD 面积的百分之多少?
  1. A.15
  2. B.18
  3. C.20
  4. D.24
  5. E.25

正确答案 · Correct Answer

C

解析 · Solution

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