算一卷布的长度怎么算?一卷面料,具体的还没量,里面有个纸筒!内直径a,外直径b,厚度h;π(a+b)*(b-a)/h=总长度!步骤是这样的:先算出多少层,(b-a)/h;在算内周长跟外周长的平均值也就是平均1
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/09 06:14:14
![算一卷布的长度怎么算?一卷面料,具体的还没量,里面有个纸筒!内直径a,外直径b,厚度h;π(a+b)*(b-a)/h=总长度!步骤是这样的:先算出多少层,(b-a)/h;在算内周长跟外周长的平均值也就是平均1](/uploads/image/z/9332630-62-0.jpg?t=%E7%AE%97%E4%B8%80%E5%8D%B7%E5%B8%83%E7%9A%84%E9%95%BF%E5%BA%A6%E6%80%8E%E4%B9%88%E7%AE%97%3F%E4%B8%80%E5%8D%B7%E9%9D%A2%E6%96%99%2C%E5%85%B7%E4%BD%93%E7%9A%84%E8%BF%98%E6%B2%A1%E9%87%8F%2C%E9%87%8C%E9%9D%A2%E6%9C%89%E4%B8%AA%E7%BA%B8%E7%AD%92%21%E5%86%85%E7%9B%B4%E5%BE%84a%2C%E5%A4%96%E7%9B%B4%E5%BE%84b%2C%E5%8E%9A%E5%BA%A6h%EF%BC%9B%CF%80%EF%BC%88a%2Bb%29%2A%28b-a%29%2Fh%3D%E6%80%BB%E9%95%BF%E5%BA%A6%21%E6%AD%A5%E9%AA%A4%E6%98%AF%E8%BF%99%E6%A0%B7%E7%9A%84%3A%E5%85%88%E7%AE%97%E5%87%BA%E5%A4%9A%E5%B0%91%E5%B1%82%2C%EF%BC%88b-a%EF%BC%89%2Fh%EF%BC%9B%E5%9C%A8%E7%AE%97%E5%86%85%E5%91%A8%E9%95%BF%E8%B7%9F%E5%A4%96%E5%91%A8%E9%95%BF%E7%9A%84%E5%B9%B3%E5%9D%87%E5%80%BC%E4%B9%9F%E5%B0%B1%E6%98%AF%E5%B9%B3%E5%9D%871)
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