小刚用一张半径为24cm的扇形纸板做一个如图所示的圆锥形小丑帽子侧面(接缝忽略不计)，如果做成的圆锥形小丑帽子的底面半径为10cm，那么这张扇形纸板的面积是( )_刷题宝

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小刚用一张半径为24cm的扇形纸板做一个如图所示的圆锥形小丑帽子侧面(接缝忽略不计)，如果做成的圆锥形小丑帽子的底面半径为10cm，那么这张扇形纸板的面积是( )

A：120πcm²

B：240πcm²

C：260πcm²

D：480πcm²

上一题下一题 0.0难度选择题更新时间:2015-09-11 06:07:58

答案(点此获取答案解析）

B

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