单选题
The figure above shows a cylindrical can that has been cut open and flattened．
The figure above shows a cylindrical can that has been cut open and flattened．
【正确答案】
C
【答案解析】左面的图形表示一个切开后并展开的圆柱体罐子。
由图可知该圆柱体的高为5，底面圆的半径为3，根据圆柱体的体积公式可得该圆柱体的体积为：
πr2?h=π?32?5=45π
由图可知该圆柱体的高为5，底面圆的半径为3，根据圆柱体的体积公式可得该圆柱体的体积为：
πr2?h=π?32?5=45π