一个立体图形的三视图如图所示.根据图中数据求得这个立体图形的

一个立体图形的三视图如图所示.根据图中数据求得这个立体图形的表面积为(  )

A2π   B6π    C7π   D

答案

D【考点】由三视图判断几何体;圆柱的计算.

【分析】从三视图可以看正视图以及俯视图为矩形,而左视图为圆形,可以得出该立体图形为圆柱,再由三视图可以圆柱的半径,长和高求出体积.

【解答】解:正视图和俯视图是矩形,左视图为圆形,

可得这个立体图形是圆柱,

这个立体图形的侧面积是×3=6π

底面积是:π•12

这个立体图形的表面积为+2π=8π

故选D

 

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