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，两种布要 王阿姨做了一个圆柱形的抱枕，长80cm，底面直径18cm。如...

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\u5e95\u9762\u534a\u5f84\uff1a18\u00f72=9\uff08\u5398\u7c73\uff09
\u9700\u8981\u9ec4\u5e03\uff1a9²\u00d73.14\u00d72=508.68\uff08\u5e73\u65b9\u5398\u7c73\uff09
\u9700\u8981\u82b1\u5e03\uff1a18\u00d73.14\u00d780=4521.6\uff08\u5e73\u65b9\u5398\u7c73\uff09

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\u4e24\u4e2a\u5e95\u9762\u79ef\uff1a3.14\u00d7\uff0818\u00f72\uff09²\u00d72
=3.14\u00d781\u00d72
=508.68\uff08\u5e73\u65b9\u5398\u7c73\uff09
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花布的用料=圆柱形的侧面积=πd*h=3.14*18*80=4521.6平方厘米
黄布的用料=两个底面的面积和=2*πr^2=2*3.14*9*9=508.68平方厘米

鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋,闀80鍘樼背,搴曢潰鐩村緞18鍘樼背銆傚鏋滀晶闈㈢敤鑺...
绛旓細鑺卞竷鐢ㄥ竷 =渚ч潰绉 =3.14脳18脳80 =4521.6骞虫柟鍘樼背 榛勫竷鐢ㄥ竷 =搴曢潰绉2 =3.14脳锛18梅2锛²脳2 =508.68骞虫柟鍘樼背

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...
绛旓細瑙ｏ細渚ч潰绉細3.14脳18脳80=4521.6锛堝钩鏂瑰帢绫筹級涓や釜搴曢潰绉細3.14脳锛18梅2锛²脳2 =3.14脳81脳2 =508.68锛堝钩鏂瑰帢绫筹級绛旓細渚ч潰鐢ㄨ姳甯冮渶瑕4521.6骞虫柟鍘樼背锛屽簳闈㈢敤榛勫竷闇瑕508.68骞虫柟鍘樼背锛

鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋,闀80cm,搴曢潰鐩寸粡18cm銆傚鏋滀晶闈㈢敤鑺卞竷,搴...
绛旓細瑙ｏ細鑺卞竷锛3.14脳18脳80锛4 521.6(cm )锛岄粍甯冿細3.14脳(18梅2) 脳2锛508.68(cm ).鏁呯瓟妗堜负锛氳姳甯冿細4 521.6 cm 榛勫竷锛508.68 cm

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18鍘樼背銆傚鏋滀晶闈㈢敤鑺卞竷...
绛旓細搴曢潰鍗婂緞锛18梅2=9锛堝帢绫筹級闇瑕侀粍甯冿細9²脳3.14脳2=508.68锛堝钩鏂瑰帢绫筹級闇瑕佽姳甯冿細18脳3.14脳80=4521.6锛堝钩鏂瑰帢绫筹級

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,濡傛灉渚ч潰鐢ㄨ姳甯,搴...
绛旓細闀80cm锛屽绛変簬鍦嗘煴浣撳懆闀匡紝鍗18cm*3.1415926 鍒楀紡锛80*18*3.1415926=4523.893344骞虫柟鍘樼背 鍐嶆眰榛勫竷闈㈢Н锛屾湁涓や釜绔潰锛屾墍浠ラ粍甯冮潰绉槸鍦伴潰绉殑2鍊 鍒楀紡锛18/2*18/2*3.1415926*2 =9*9*3.1415926*2 =508.938骞虫柟鍘樼背 绛旓細闇鑺卞竷4523.893344骞虫柟鍘樼背锛岄渶榛勫竷508.938骞虫柟鍘樼背銆

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...
绛旓細渚ч潰绉細2蟺rh=2脳3.14脳9脳80=4521.6 骞虫柟鍘樼背 鑺卞竷瑕佺敤4521.6 骞虫柟鍘樼背 搴曢潰绉細2蟺r²=2脳3.14脳81=508.68骞虫柟鍘樼背 榛勫竷瑕佺敤508.68骞虫柟鍘樼背

鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋,闀80銕,搴曢潰鐩村緞18銕濄傚鏋滀晶闈㈢敤鑺卞竷,搴...
绛旓細r=18/2=9 搴曢潰绉=3.14*9*9*2=508.68 渚ч潰绉=3.14*18*80=4521.6

鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋曢暱 80 鍘樼背,鍦伴潰鐩村緞 18 鍘樼背,濡傛灉渚ч潰鐢ㄨ姳 ...
绛旓細鑺卞竷瑕288蟺銕濈殑骞虫柟锛岄粍甯冭162蟺銕濈殑骞虫柟銆

鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋,闀90cm銆傚簳闈㈢洿寰16cm銆傚鏋滀晶闈㈢敤鑺卞竷搴曢潰...
绛旓細16脳3.14脳90=4521.6(骞虫柟鍘樼背)鑺卞竷鑷冲皯鐢ㄤ簡4521.6骞虫柟鍘樼背銆

鐜嬮樋濮ㄥ仛浜嗕竴涓渾鏌卞舰鐨勬姳鏋曢暱80cm 搴曢潰鐩村緞18cm 濡傛灉渚ч潰鐢ㄨ姳甯冨簳闈...
绛旓細鐩村緞18cm 鍗婂緞r=18梅2=9cm 搴曢潰绉疭=蟺r²=3.14x9x9=254.34骞虫柟鍘樼背 搴曢潰鐢ㄩ粍鑹茬殑甯冧负2x254.34=508.68骞虫柟鍘樼背 鐩村緞涓3.14x18=56.52鍘樼背 渚ч潰鐢ㄨ姳甯80x56.52=4521.6骞虫柟鍘樼背