问题
单项选择题
The figure above represents a rectangular parking lot that is 30 meters by 40 meters and an attached semicircular driveway that has an outer radius of 20 meters and an inner radius of 10 meters. If the shaded region is not included, what is the area, in square meters, of the lot and driveway
答案
参考答案：E
解析： 根据题意可得所求的面积为长方形的面积加上半径为20米的半圆的面积再减去中间阴影部分的面积：
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