一个钢质的圆柱体零件重1763.424克，它的侧面展开图是一个长方形，长方形的长 发布时间：2017-05-06 13:12 │ 来源：www.tikuol.com 题型：解答题 问题： 一个钢质的圆柱体零件重1763.424克，它的侧面展开图是一个长方形，长方形的长（不是圆柱体的高）是18.84厘米，求这个圆柱体的高（每立方厘米钢重7.8克）．
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