2012 AMC 8 第 21 题
先试着解答 2012 AMC 8 第 21 题，然后核对你的答案与视频与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2012 AMC 8 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
21.
Marla 有一个边长 英尺的大白色立方体。她还有足够覆盖 平方英尺的绿色油漆。Marla 用完所有油漆，在每个面上画出一个居中的白色正方形，周围是绿色边框。每个白色正方形的面积是多少平方英尺？
Marla has a large white cube that has an edge of feet. She also has enough green paint to cover square feet. Marla uses all the paint to create a white square centered on each face, surrounded by a green border. What is the area of one of the white squares, in square feet?
小提示：
绿色油漆覆盖了立方体表面积的一半。
The green paint covers half of the cube surface area.
大提示：
剩余未涂区域平均分布在六个面上。
The remaining unpainted area is split equally among the six faces.
视频讲解：
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文字解答：
立方体总表面积为 。因此未被绿色覆盖的面积为 平方英尺，平均到每个面是 平方英尺。
所以正确答案是 D。
The total surface area is Therefore, square feet aren’t covered. This would be square feet per face.
Thus, the answer is D .
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