如图,用一根铁丝将四根直径2dm的管子紧紧捆住(接头处不计),至少需要铁丝多少分米?[提示:A的长度相当于一根管子的直径]恩恩呢
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/29 02:55:57
![如图,用一根铁丝将四根直径2dm的管子紧紧捆住(接头处不计),至少需要铁丝多少分米?[提示:A的长度相当于一根管子的直径]恩恩呢](/uploads/image/z/5020521-33-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%94%A8%E4%B8%80%E6%A0%B9%E9%93%81%E4%B8%9D%E5%B0%86%E5%9B%9B%E6%A0%B9%E7%9B%B4%E5%BE%842dm%E7%9A%84%E7%AE%A1%E5%AD%90%E7%B4%A7%E7%B4%A7%E6%8D%86%E4%BD%8F%28%E6%8E%A5%E5%A4%B4%E5%A4%84%E4%B8%8D%E8%AE%A1%29%2C%E8%87%B3%E5%B0%91%E9%9C%80%E8%A6%81%E9%93%81%E4%B8%9D%E5%A4%9A%E5%B0%91%E5%88%86%E7%B1%B3%3F%5B%E6%8F%90%E7%A4%BA%EF%BC%9AA%E7%9A%84%E9%95%BF%E5%BA%A6%E7%9B%B8%E5%BD%93%E4%BA%8E%E4%B8%80%E6%A0%B9%E7%AE%A1%E5%AD%90%E7%9A%84%E7%9B%B4%E5%BE%84%5D%E6%81%A9%E6%81%A9%E5%91%A2)
如图,用一根铁丝将四根直径2dm的管子紧紧捆住(接头处不计),至少需要铁丝多少分米?[提示:A的长度相当于一根管子的直径]恩恩呢
如图,用一根铁丝将四根直径2dm的管子紧紧捆住(接头处不计),至少需要铁丝多少分米?[提示:A的长度相当于一根管子的直径]
恩恩呢
如图,用一根铁丝将四根直径2dm的管子紧紧捆住(接头处不计),至少需要铁丝多少分米?[提示:A的长度相当于一根管子的直径]恩恩呢
π×2+2×4=3.14×2+8=14.28(dm)
(2+2)X4=16分米
c=派d
=3.14×2
=6.28(dm)
6.28 2×4=14.28(dm)