王阿姨做了一个圆柱形的抱枕，长80厘米，底面直径18厘米。如果侧面用花布，底面用黄色的布，两种布各
\u738b\u963f\u59e8\u505a\u4e86\u4e00\u4e2a\u5706\u67f1\u5f62\u7684\u62b1\u6795,\u957f80\u5398\u7c73,\u5e95\u9762\u76f4\u5f8418\u5398\u7c73.\u5982\u679c\u4fa7\u9762\u7528\u82b1\u5e03,\u5e95\u9762\u7528\u9ec4\u8272\u7684\u5e03,\u4e24\u79cd\u5e03\u4e2a\u9700\u8981\u591a\u5c11\u82b1\u5e03\u7528\u5e03
=\u4fa7\u9762\u79ef
=3.14\u00d718\u00d780
=4521.6\u5e73\u65b9\u5398\u7c73
\u9ec4\u5e03\u7528\u5e03
=\u5e95\u9762\u79ef\u00d72
=3.14\u00d7\uff0818\u00f72\uff09²\u00d72
=508.68\u5e73\u65b9\u5398\u7c73
\u5f88\u9ad8\u5174\u4e3a\u4f60\u89e3\u7b54\uff0c\u795d\u4f60\u5b66\u4e60\u8fdb\u6b65\uff01\u4e00\u523b\u6c38\u8fdc523 \u4e3a\u4f60\u89e3\u7b54~~
\u5982\u679c\u4f60\u8ba4\u53ef\u6211\u7684\u56de\u7b54\uff0c\u8bf7\u70b9\u51fb\u4e0b\u9762\u7684\u3010\u9009\u4e3a\u6ee1\u610f\u56de\u7b54\u3011\u6309\u94ae\uff0c\u8c22\u8c22~~
\u5982\u679c\u8fd8\u6709\u5176\u5b83\u95ee\u9898\uff0c\u8bf7\u53e6\u5916\u5411\u6211\u6c42\u52a9\uff0c\u7b54\u9898\u4e0d\u6613\uff0c\u656c\u8bf7\u7406\u89e3~~
\u82b1\u5e03\u7528\u5e03
=\u4fa7\u9762\u79ef
=3.14\u00d718\u00d780
=4521.6\u5e73\u65b9\u5398\u7c73
\u9ec4\u5e03\u7528\u5e03
=\u5e95\u9762\u79ef\u00d72
=3.14\u00d7\uff0818\u00f72\uff09²\u00d72
=508.68\u5e73\u65b9\u5398\u7c73
绛旓細鑺卞竷鐨勭敤鏂=鍦嗘煴褰㈢殑渚ч潰绉=蟺d*h=3.14*18*80=4521.6骞虫柟鍘樼背 榛勫竷鐨勭敤鏂=涓や釜搴曢潰鐨勯潰绉拰=2*蟺r^2=2*3.14*9*9=508.68骞虫柟鍘樼背
绛旓細涓銆佷晶闈㈣姳甯冪敤閲忎篃灏辨槸鍦嗘煴鐨渚ч潰绉細蟺脳D脳h=3.14脳10脳80=2512骞虫柟鍘樼背锛涗簩銆佸簳闈㈤粍甯冪敤閲忎篃灏辨槸2鍊嶇殑鍦嗘煴搴曢潰绉細2脳蟺脳r^2=2脳3.14脳(10梅2)^2=157骞虫柟鍘樼背銆
绛旓細鑺卞竷锛3.14x18x80=4521.6骞虫柟鍘樼背 榛勫竷锛18梅2=9cm 3.14x9x9x2=508.68骞虫柟鍘樼背
绛旓細搴曢潰鐨勯粍甯冪敤鍦嗙殑闈㈢Н鍏紡璁＄畻锛18/2=9 9鐨勫钩鏂逛负81锛堜笉濂芥剰鎬濓紝鎴戜笉鐭ラ亾鎬庝箞鎵撲笂鏍囩殑2锛3.14*81=254.34(骞虫柟鍘樼背)鍥鎶辨灂鏄湁涓や釜搴曪紝鎵浠ラ粍甯冩诲叡闇瑕侊細254.34*2=508.68锛堝钩鏂瑰帢绫筹級渚ч潰鐨勮姳甯冨彲浠ョ敤闀挎柟褰㈢殑闈㈢Н鍏紡璁＄畻锛氶暱涓80cm 鐭负搴曢潰鍦嗙殑鍛ㄩ暱锛3.14*18=56.52cm 鏁咃紝鑺卞竷鐨...
绛旓細銆愬弬鑰冪瓟妗堛1.鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋曪紝闀80鍘樼背锛屽簳闈㈢洿寰18鍘樼背銆傚鏋滀晶闈㈢敤鑺卞竷锛屽簳闈㈢敤榛勮壊甯冿紝涓ょ甯冨悇闇瑕佸灏戯紵銆愯В銆戝簳闈㈠懆闀=18脳3.14=56.52锛堝帢绫筹級搴曢潰闈㈢Н=18梅2脳18梅2脳3.14=254.34锛堝钩鏂瑰帢绫筹級鐢诲竷闈㈢Н=搴曢潰鍛ㄩ暱脳鎶辨灂闀=56.52脳254.34=4521.6锛堝钩鏂瑰帢绫筹級榛勫竷闈㈢Н=...
绛旓細鑺卞竷1440鈭 銕²榛勫竷81鈭 銕²
绛旓細缂哄皯鏉′欢锛屽皯涓涓簳闈㈢殑鍗婂緞R銆傝姳甯=渚ч潰绉=2*蟺*R*闀=160蟺R锛堝钩鏂瑰帢绫筹級榛勮壊鐨勫竷=搴曢潰=2*蟺*R2,濡傛灉鐭ラ亾鎶辨灂鐨勫簳闈㈠崐寰勶紝鐩存帴甯﹁繘鍘诲氨鍙互寰楀埌涓ょ甯冨垎鍒敤澶氬皯锛屾弧鎰忚閲囩撼銆
绛旓細鑺卞竷锛欳=蟺d=3.14脳18=56.52CM S=Ch=56.52脳80=4521.6骞虫柟鍘樼背 榛勫竷锛歋=2脳蟺锛坉/2锛塣2=2脳3.14脳(18/2)^2=508.68骞虫柟鍘樼背
绛旓細鑺卞竷4521.6骞虫柟鍘樼背锛岄粍鑹茬殑60.68骞虫柟鍘樼背
绛旓細鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋,闀80cm,搴曢潰鐩村緞18cm銆傚鏋滀晶闈㈢敤鑺卞竷,搴曢潰鐢ㄩ粍鑹茬殑甯,涓ょ甯冨悇闇瑕佸灏?... 鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋,闀80cm,搴曢潰鐩村緞18cm銆傚鏋滀晶闈㈢敤鑺卞竷,搴曢潰鐢ㄩ粍鑹茬殑甯,涓ょ甯冨悇闇瑕佸灏? 灞曞紑 鎴戞潵绛 1涓洖绛 #鐑# 瀛╁瓙涔嬮棿鎵撴灦 鐖舵瘝瑕佷笉瑕佸共棰?
