一种无盖圆锥铁皮水桶，底面直径3分米，高六分米。做十个这样的水桶需要多少平方米的铁片 一只圆柱形的无盖铁皮水桶，底面直径是3分米，高是5分米，做这...
\u4e00\u4e2a\u65e0\u76d6\u7684\u5706\u67f1\u5f62\u6c34\u6876,\u5e95\u9762\u76f4\u5f843\u5206\u7c73,\u9ad84.5\u5206\u7c73,\u505a10\u4e2a\u8fd9\u6837\u7684\u6c34\u6876\u9700\u8981\u591a\u5c11\u5e73\u65b9\u7c73\u7684\u94c1\u76ae(\u5f97\u6570\u4fdd\u7559\u4e00\u4f4d\u5c0f\u6570)\u5e95\u9762\u76f4\u5f843\u5206\u7c73 \u5e95\u9762\u534a\u5f841.5\u5206\u7c73
\u4fa7\u9762\u79ef\uff1a 3x3.14x4.5=42.39\uff08\u5e73\u65b9\u5206\u7c73\uff09
\u5e95\u9762\u79ef\uff1a 1.5x1.5x3.14=7.065\uff08\u5e73\u65b9\u5206\u7c73\uff09
\u505a\u4e00\u4e2a\u6c34\u6876\u9700\u8981\uff1a
42.39+7.065=49.455\uff08\u5e73\u65b9\u5206\u7c73\uff09
\u505a\u5341\u4e2a\u9700\u8981\uff1a
49.455x10=494.55(\u5e73\u65b9\u5206\u7c73)=4.9455\u5e73\u65b9\u7c73 \u7ea6\u7b49\u4e8e5.0\u5e73\u65b9\u7c73
\u4e0d\u61c2\u53ef\u4ee5\u8ffd\u95ee
\u2460\u534a\u5f84\uff1a
3\u00f72=1.5(\u5206\u7c73)
\u2461\u5e95\u9762\u79ef\uff1a
3.14X1.5X1.5
=7.055(\u5e73\u65b9\u5206\u7c73)
\u2462\u4fa7\u9762\u79ef\uff1a
3.14X3X5
=47.1(\u5e73\u65b9\u5206\u7c73)
\u2463\u8868\u9762\u79ef\uff1a
7.055\u534147.1
=54.155(\u5e73\u65b9\u5206\u7c73)
有勾股定理先算母线长，再用母线长算弧长。再用1/2LR.就能算面积了。
绛旓細銆愬垎鏋愩戯紙1锛夌敱浜姘存《鏃犵洊锛屼篃灏辨槸姹備竴涓簳闈㈢Н鍜屼晶闈㈢Н锛屽渾鏌辩殑渚ч潰绉=搴曢潰鍛ㄩ暱脳楂=蟺Rh锛屽簳闈鏄竴涓渾锛屽渾鐨勫叕寮忔槸锛歴=蟺r²锛屾妸鏁版嵁浠ｅ叆鍏紡瑙ｇ瓟锛涳紙2锛夋牴鎹渾鏌辩殑瀹圭Н锛堜綋绉級鍏紡锛歷=sh锛屾眰鍑烘按妗剁殑瀹圭Н锛屽啀鏍规嵁瀹圭Н鍗曚綅鍜屼綋绉殑鎹㈢畻鏂规硶锛屾崲绠楁垚瀹圭Н鍗曚綅鍗冲彲銆傘愯В绛斻戣В锛氾紙1锛...
绛旓細搴曢潰鐩村緞=6鍒嗙背锛屽崐寰=3鍒嗙背銆傚仛杩欎釜姘存《鑷冲皯瑕佺敤=3.14脳3脳3+3.14脳6脳6=141.3骞虫柟鍒嗙背
绛旓細鍏堟眰浣撶Н锛3.14涔樹互15^2涔樹互50=35325姣崌=35.325鍗 涓鍗囨按涓鍗冨厠 鎵浠ュ彇鏁村氨涓35鍗冨厠
绛旓細h=4鍒嗙背锛屽簳闈绉=2X2X3.14=12.56锛岃〃闈㈢Н=3.14X2X2X4=50.24锛屽叡12.56鍗50.24X2=113.04
绛旓細锛1锛3/2=1.5 1.5*1.5*3.14=7.065 3*3.14*4.5=42.39 42.36+7.065绾︾瓑浜50 锛2锛1.2*3.14*2=7.536 7.536*5=37.68 锛3锛2*3.14*1.5*锛2.5+1.5锛=37.68 37.68*0.7=26.376 锛4锛25.12/6.28=4 4*4*3.14*1.5/3*1.5=37.68 锛5...
绛旓細1.5脳2/3=1锛堢背锛3.14脳(1梅2)²脳2+1脳3.14脳1.5 =3.14脳0.5+3.14脳1.5 =3.14脳2 =6.28锛堝钩鏂圭背锛夌瓟锛氬仛杩欎釜姘存《澶х害瑕佺敤6.28骞虫柟绫崇殑閾佺毊 瀵规垜鐨勫洖绛旀湁涓嶆槑鐧界殑鍙互杩介棶锛佸鏋滄湁鍏朵粬闂璇峰彟鍙戞垨鐐瑰嚮鍚戞垜姹傚姪銆傜瀛︿範杩涙锛
绛旓細鍒嗘瀽锛氬仛涓涓鏃犵洊鐨勫渾鏌卞舰姘存《闇瑕佸灏閾佺毊锛灏辨槸姹傚渾鏌变綋鐨勪晶闈㈢Н鍜屼竴涓簳闈㈢Н涔嬪拰銆傝В锛氶渶瑕侀搧鐨細蟺r²+蟺dh 锛3.14脳(20梅2)²+3.14脳20脳50 =314+3140 =3454锛坈m²锛夌瓟锛氳嚦灏戦渶瑕3454骞虫柟鍘樼背閾佺毊銆
绛旓細1鍋氫竴瀵鏃犵洊鐨勫渾鏌卞舰閾佺毊姘存《,楂樻槸24cm,搴曢潰鐩村緞鏄20cm,鑷冲皯闇瑕侀搧鐨紙1821.2锛塩m锛2寮犲ぇ鍙斿噯澶囨惌寤哄嚑涓ぇ妫氱敤鏉ョ妞嶉鐡滐紝姣忎釜澶ф闀20绫筹紝妯埅闈㈡槸涓涓崐寰勪负2绫崇殑鍗婂渾銆傦紙1锛夐棶瑕嗙洊鍦ㄨ繖鏍峰ぇ妫氫笂鐨勫鏂欒啘澶х害澶氬皯骞虫柟绫筹紵3.14脳2²+3.14脳2脳20=138.16骞虫柟绫 锛2锛夎繖鏍风殑涓涓ぇ妫氬唴...
绛旓細2 涓鍙板帇璺満鐨勫墠杞槸鍦嗘煴褰紝浼﹀1.5绫筹紝鐩村緞1.2绫筹紝鍓嶈疆杞姩涓鍛紝鍘嬬殑闈㈢Н鏄灏 3 涓绉嶆棤鐩栭搧鐨按妗讹紝搴曢潰鍗婂緞鏄10鍘樼背锛岄珮30鍘樼背锛屽鏋滅敤35000骞虫柟鍘樼背鐨勬鏂瑰舰閾佺毊鏉ュ仛锛屾渶澶氬仛鍑犱釜 4 鎶婁竴涓暱2绫锛屽簳闈㈢洿寰鏄0.4绫崇殑鍦嗘煴褰㈤挗鏉愰敮鎴2娈碉紝琛ㄩ潰绉鍔犱簡澶氬皯 5涓嶇敤鏂圭▼锛岃В涓嬪垪鏁板棰...
绛旓細濉┖锛1棰橈細4800 2棰橈細18.84 瑙ｅ喅闂锛1棰橈細锛25.12梅3.14梅2锛夌殑骞虫柟脳3.14脳1.5梅3脳1.5 2棰橈細浣撶Н涓嶅彉锛4脳1.5脳4脳3梅1.5 3棰橈細鈥滄í鎴潰涓烘鏂瑰舰鈥濊鏄庨暱鏂逛綋瀹藉拰楂樻兂绛锛屽渾閿ュ簳闈㈢洿寰绛変簬闀挎柟浣撶殑瀹藉拰楂橈紝鍦嗛敟鐨勯珮绛変簬闀挎柟浣撶殑闀匡紝鍒楀紡涓猴細6.28梅3.14=2鍘樼背 2脳...
