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gwd-2-5(gmat)

gwd2

In the figure, points A, B, C, D, and E lie on a line. A is on both circles, B is the center of the smaller circle, C is the center of the larger circle, D is on the smaller circle, and E is on the larger circle. What is the area of the region inside the larger circle and outside the smaller circle?

(1) AB = 3 and BC =2

(2) CD =1 and DE = 4

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

抱歉,图贴不上来。我看了大家的讨论,说是答案是D,因为图中A,B,C,D,E的顺序可以变化。但是题目一上来就说了"In the figure",那就应该按照图中给出的作题阿!

再求答案到底是D还是A?谢谢!

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D是对的,DE可以看成是大圆的直径减去小圆的直径,这样小圆的半径可求。
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