用铁皮做一个工件,此工件原为圆柱体,现斜着截去一部分其中ab（高）长54厘米,cd（高）长46厘米,bd（直径）长15厘米需用铁皮最少（ ）平方厘米.急~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~急~~
问题描述：
用铁皮做一个工件,此工件原为圆柱体,现斜着截去一部分其中ab（高）长54厘米,cd（高）长46厘米,bd（直径）长15厘米需用铁皮最少（ ）平方厘米.急~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~急~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
答
make a workpiece using/by ironhide ; the original workpiece is a cylinder and now you need to truncate a part of it,which is line(可以省略） ab(height) about 54 cm,line ad(height) about 46cm,and line bd (diameter) about 15 cm.how many square centimeters is needed to take at least?
c