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(2011•海陵区模拟)将半径为40cm的圆形铁皮,做成四个相同的圆锥容器的侧面...
(2011•海陵区模拟)将半径为40cm的圆形铁皮,做成四个相同的圆锥容器的侧面(不浪费材料,不计接缝处的材料损耗),那么每个圆锥容器的底面半径为( )
A.10cm
B.20cm
C.30cm
D.60cm
考点分析:
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