分割成两个完全一样的小圆柱体,这两个圆柱体表面积之和比原来圆柱体表面积多了两个底面积
3.14*6^2*2=226.08平方厘米
沿直径切开,则表面积增加了两个以底面直径和高为长和宽的长方形的面积
6*2*15*2=360平方厘米
把一个半径6cm,高15cm的圆柱体木料,分割成两个完全一样的小圆柱体,这两个圆柱体表面积之和比原来圆柱体表面积多多少平方厘米?若沿直径切开,则表面积增加多少平方厘米?
把一个半径6cm,高15cm的圆柱体木料,分割成两个完全一样的小圆柱体,这两个圆柱体表面积之和比原来圆柱体表面积多多少平方厘米?若沿直径切开,则表面积增加多少平方厘米?
数学人气：372 ℃时间：2020-02-01 09:23:02
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