XIAOHUANHUAN 当前离线
高级会员
Q7:A circular mat with diameter 20 inches is placed on a square tabletop, each of whosesides is 24 inches long. Which of the following is closest to the fraction of the tabletopcovered by the mat?
A. 5/12B. 2/5C. 1/2D. 3/4E. 5/6
catkittycats 当前离线
直径20的圆和边长24的正方形的面积之比
100PI:24*24=314:576=0.545
那么1/2即C最接近~
答案C
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