一根直径1.6厘米的pvc管，用3米围成一个圆圈，在用宽度2.5厘米的胶带缠一圈，需要多少米的胶带 理工科专业数学不好是种怎样的体验？
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120x1.6x3.142=603.264厘米，必须是不重叠的绛旓細1锛氫竴鑸淇患鍚堝竷绾垮伐绋嬫墍鐢ㄧ殑闃荤噧绠鐩村緞1.6鍘樼背锛淇楃О16绾跨銆2锛氬眬閮ㄥぇ鍔熺巼鐢垫簮鎻掑骇绾挎墍鐢ㄧ殑闃荤噧绠￠夌敤2鍘樼背鐩村緞锛淇楃О4鍒嗙鎴20绾跨銆
绛旓細鎵╁睍闃呰锛PVC姘寸澶栧緞20姣背鐨勭О涓4鍒嗙锛屽寰25姣背鐨勶紝绉颁负6鍒嗙锛岃繖绉PVC绠″瓙閮芥槸璁插寰勭殑锛屽洜涓哄悇绉嶇墝瀛愮瀛 鍘氬害涓嶄竴锛岃嫢涓嶆爣鍑嗙殑璇濓紝鎵浠ュ唴寰勬槸鏃犳硶纭畾鐨勩傜嚎绠″垎涓16銆20銆25銆32銆40銆50绛夛紝涔熸槸璁插寰勭殑锛屽氨鏄寰16姣背锛屾垨鑰20姣背杩欐牱鐨勩傚垎涓鸿交鍨嬶紝涓瀷锛岄噸鍨嬶紝涔熷氨鏄205,305,405涔...
绛旓細0.2鍗囨垨鑰呮槸0.2鍏枻涓 鐩村緞2鍘樼背绠″瓙鍐呭緞1.6鍘樼背1绫宠兘瑁0.2鍗囨垨鑰0.2鍏枻姘淬
绛旓細1. 鍙栦竴鍧楀昂瀵镐负闀20鍘樼背銆佸4.8鍘樼背銆侀珮5.5鍘樼背鐨鏈ㄥ潡锛屼互姝ゅ埗浣滄綔姘磋墖妯″瀷銆傦紙瑙佸浘6.6-4锛夊湪鏈ㄥ潡搴曢儴寮鍑涓涓闀18鍘樼背銆佸1.6鍘樼背銆佹繁1.8鍘樼背鐨勫嚬妲姐2. 鍑嗗涓鍙鐩村緞1.6鍘樼背銆侀暱搴︿负16鍘樼背鐨勮瘯绠★紝骞堕厤浠ヨ蒋鏈ㄥ銆傚湪杞湪濉炰笂閽讳袱涓洿寰勪负0.4鍘樼背鐨勫瓟銆傚皢涓鏍闀垮害涓16.5鍘樼背鐨勭幓鐠冪...
绛旓細鍐呭緞1.2 澶栧緞1.6 鐨勬槸3鍒嗙
绛旓細瑙ｏ細澶鐩村緞鏄1.6绫 鍒欏鍗婂緞鏄1.6梅2=0.8绫 绠″鏄20鍘樼背=0.2绫 鍒欏唴鍗婂緞鏄0.8-0.2=0.6绫 姹＄妯潰绉:3.14*0.8²-3.14*0.6²=2.0096-1.1304 =0.88骞虫柟绫
绛旓細2. 涓嶉攬閽㈢鏄彟涓绉嶉夋嫨锛屽畠鏃㈠崼鐢熷張瀹夊叏锛屼笖鑰愮敤銆備笌閾滅鐩告瘮锛屼笉閿堥挗绠℃洿鍏蜂环鏍间紭鍔匡紝骞朵笖閫傚悎鐢ㄤ簬椋熷搧鍜屽寲宸ヨ涓氾紝鍏锋湁鑹ソ鐨勭幆淇濇у拰鍙洖鏀舵с3. 鏃ュ父鐢熸椿涓箍娉涗娇鐢ㄧ殑鏄PVC绠￠亾锛瀹冨彲鐢ㄤ綔鎺掓按绠℃垨鍐风儹姘寸銆侾VC绠￠亾鐨勫簲鐢ㄨ寖鍥撮潪甯稿箍娉涖傛荤粨锛氬湪閫夋嫨姘寸鏃讹紝闇瑕佹牴鎹绠￠亾鐨勭洿寰鍜岀绫昏繘琛屾寫閫夈
绛旓細姘寸鐨勫彛寰勬槸鎸夌収鑻卞鐨勯暱搴﹀彨娉曪紝1鍚=25.4mm锛1鍚=3.175mm 4鍚=12.7mm锛屾湁缂濈鏄寚鍐呭緞 ½銆=4鍚=12.7mm鐢变簬澹佸帤钖勫帤涓嶅悓鏃犳硶鍥哄畾锛屽寰21锛3鏄浐瀹氱殑锛岀粺绉板寰21.3鐨勭涓½銆炵銆傚寰26.8mm鐨勭瀛愪负¾銆绠★紝
绛旓細鍦扮儹绠℃湁(绠″瓙鐩村緞锛1.6鍘樼背锛2鍘樼背锛2.5鍘樼背鐨勶紝1.6鍘樼背涓鑸摵骞插紡鍦版殩鐢紝閾哄湴鐑敤鐨勬渶澶氱殑鏄2鍘樼背鐨勩備綘璇寸殑涓姘寸鏄寚鑷潵姘寸殑杩樻槸澶槼鑳界殑锛熻嚜鏉ユ按涓婃按绠℃湁20锛25锛32锛40锛50锛63锛75锛90.110锛屽搴敤20锛25杈冨锛32鐨勬殩姘旂敤澶氥備笅姘寸鍨嬪彿鍜岃嚜鏉ユ按鐨勪竴鏍凤紝杩樻湁160锛200锛250鐨勶紝涓鑸...
绛旓細鍦ㄥ痉鍥,PVC鐨勭敓浜ч噺鍜屾秷璐归噺骞冲潎涓轰竴鐧惧洓鍗佷竾鍚ㄣ 5.鏍囧噯DN500 绠″緞 灏哄鏄灏 dn500鍏О鐩村緞500mm銆 鍏О鐩村緞鍙堝彨骞冲潎澶栧緞,鏃笉鏄寰,涔熶笉鏄唴寰,浣嗘帴杩戜簬鍐呭緞,鏄湪鍐呭緞闄勮繎鐨涓涓鏁版嵁,涓鑸=鍐呭緞+澹佸帤鐨勫钩鍧囧,鍏埗mm涓哄熀鍑,绉癉N,瀹冩槸鎴戜滑璁＄畻鐢鐩村緞,鍙嶅簲鐨勬槸绠￠亾鐨勫疄闄呴氭按鑳藉姏. 鎷撳睍璧勬枡: 鍏О鐩村緞...
