英数题：A circular pool is being built inside a rectangular region 12 ft by 18 ft,If the
问题描述：
英数题：A circular pool is being built inside a rectangular region 12 ft by 18 ft,If the
A circular pool is being built inside a rectangular region 12 ft by 18 ft,If the pool is to be as large as possible,and the edge of the pool must be at least 2 ft from each edge of the rectangle,what is the maximum possible value for the radius of the pool,in feet?
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答
在12英尺x18英尺的矩形区域内建造一个圆形游泳池,要尽可能地大,而且池边距离矩形的每个边至少要有2英尺,请问游泳池的半径最大是多少英尺?
answer:
r =（12-2-2）/ 2 = 4 (ft）