直径80厘米长度6米厚度0.7厘米的钢管多重 直径70厘米,长6米,厚0.8厘米的钢管,重量是多少？
\u76f4\u5f8416\u5398\u7c73\u58c1\u539a2.5\u5398\u7c73\u5706\u7ba1\u6bcf\u7c73\u591a\u91cd83.19\u516c\u65a4/\u7c73\u3002
\u94a2\u7ba1\u7684\u5bc6\u5ea6=7.85\u514b/\u7acb\u65b9\u5398\u7c73
\u6bcf\u7c73\u91cd\u91cf
=\uff083.14*16*16-3.14*11*11\uff09/4*100*7.85
=83190.375\u514b/\u7c73
=83.19\u516c\u65a4/\u7c73
\u6269\u5c55\u8d44\u6599\uff1a
\u5bc6\u5ea6\u53cd\u6620\u4e86\u7269\u8d28\u672c\u8eab\u7684\u4e00\u79cd\u7279\u6027\uff0c\u5b83\u56e0\u6b64\u53ef\u4ee5\u53d7\u5230\u5916\u754c\u56e0\u7d20\u7684\u5f71\u54cd\u3002\u4e00\u822c\u6765\u8bb2\uff0c\u5f71\u54cd\u7269\u8d28\u5bc6\u5ea6\u7684\u4e3b\u8981\u7269\u7406\u91cf\u4e3a\u538b\u5f3a\u548c\u6e29\u5ea6\u3002
\u6c14\u4f53\u5bc6\u5ea6\u53d7\u538b\u5f3a\u548c\u6e29\u5ea6\u7684\u5f71\u54cd\u6bd4\u8f83\u660e\u663e\uff0c\u901a\u5e38\u6c14\u4f53\u53ea\u7ed9\u51fa\u6807\u51c6\u72b6\u51b5\u4e0b\u6216\u8005\u5e38\u6e29\u5e38\u538b\u4e0b\u7684\u5bc6\u5ea6\uff0c\u5176\u4ed6\u72b6\u51b5\u4e0b\u7684\u5bc6\u5ea6\u53ef\u4ee5\u901a\u8fc7\u6c14\u4f53\u7684\u72b6\u6001\u65b9\u7a0b\uff08\u4f8b\u5982\u7406\u60f3\u6c14\u4f53\u72b6\u6001\u65b9\u7a0b\u6216\u8303\u5fb7\u74e6\u5c14\u65af\u65b9\u7a0b\uff09\u8ba1\u7b97\u3002
\u6db2\u4f53\u7684\u5bc6\u5ea6\u4e3b\u8981\u53d6\u51b3\u4e8e\u6db2\u4f53\u7684\u7ec4\u5206\uff0c\u53d7\u6e29\u5ea6\u7684\u5f71\u54cd\u6bd4\u8f83\u5c0f\uff08\u4f46\u6709\u65f6\u4e5f\u4e0d\u80fd\u5ffd\u7565\uff09\u3002\u5f88\u9ad8\u7684\u538b\u5f3a\u4e5f\u4f1a\u4ea7\u751f\u660e\u663e\u5f71\u54cd\u3002 \u56fa\u4f53\u7684\u5bc6\u5ea6\u53d7\u6e29\u5ea6\u548c\u538b\u5f3a\u5f71\u54cd\u800c\u53d8\u5316\u7684\u7279\u6027\u7c7b\u4f3c\u4e8e\u6db2\u4f53\uff0c\u4e14\u4e00\u822c\u66f4\u4e0d\u660e\u663e\u3002
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1 \u5bc6\u5ea6\u8868
\u94a2\u6750\u7684\u5bc6\u5ea6\u7ea6\u4e3a7.85g/\u339d³\u3002
\u9996\u5148\u8ba1\u7b97\u4f53\u79ef\uff0c\u5706\u67f1\u4f53\u79ef\u7b49\u4e8e\u5e95\u9762\u79ef\u4e58\u4ee5\u9ad8\u3002\u94a2\u7ba1\u4f53\u79ef\u7b49\u4e8e\u5916\u5706\u67f1\u51cf\u5185\u5706\u67f1\u4f53\u79ef\u3002
3.14\u00d735²\u00d7600-3.14\u00d734.2²\u00d7600
=2307900-2,203,601.76
=104,298.24\u339d³
\u4e58\u4ee5\u5bc6\u5ea6
104,298.24️️️️️️️️️️️️️️️️\u00d77.85=818,741.184g\u00f71000\u7b49\u4e8e818.741184\u338f
W=0.02466（D-S）S ------钢的密度取7.85kg/dm³
注释：每米重量kg/m=（外径-壁厚）*壁厚*0.02466 单位取毫米：mm
所以Ф800*7的钢管每米重量为：
(800-7)*7*0.02466=136.888公斤/米；长度6米的话，重量为136.888*6=821.328公斤。
钢铁密度=7850千克/立方米
直径70厘米厚度八毫米一米钢管多重=（3.14*0.070*0.070/4-3.14*0.054*0.054/4）*1*7850
=12.226千克/米
朋友,请及时采纳正确答案,下次还可能帮您,您采纳正确答案,您也可以得到财富值,谢谢。
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