来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/04/28 18:38:47
一道外国的大学数学题,麻烦帮下忙,
明天需要用到,麻烦帮帮忙,
At x meters (x in [0,4]),the area of cross section is πr²
When the length is dx meters,the volume is πr²dx m³,the mass is ρ(x)πr²dx
See picture for the rest:
不小心漏了0.01π,结果应当乘以0.01π
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