一个圆柱形水池，底面直径是4米，深是1.2米，在水池内壁和地面抹上水泥，抹水泥的面的面积是多少 一个圆柱形水池的内壁和底面都要抹上水泥，水池底面直径是4米，...
\u4e00\u4e2a\u5706\u67f1\u5f62\u6c34\u6c60\uff0c\u5e95\u9762\u76f4\u5f844\u7c73\uff0c\u6df1\u662f2\u7c73\uff0c\u5728\u6c34\u6c60\u5468\u56f4\u548c\u5730\u9762\u62b9\u4e0a\u6c34\u6ce5\uff0c\u62b9\u6c34\u6ce5\u7684\u9762\u79ef\u662f\u591a\u5c11\u5e73\u65b9\u7c73?\u5e95\u534a\u5f84=4\u00f72=2\u7c73
\u9762\u79ef=2\u00d72\u00d73.14+4\u00d73.14\u00d72=37.68\u5e73\u65b9\u7c73
15\u5206\u7c73=1.5\u7c73\uff1b3.14\u00d74\u00d71.5+3.14\u00d7\uff08 4 2 \uff09 2 \uff0c=3.14\u00d76+3.14\u00d74\uff0c=3.14\u00d710\uff0c=31.4\uff08\u5e73\u65b9\u7c73\uff09\uff1b\u6545\u7b54\u6848\u4e3a31.4\uff0e
解：抹水泥的面积应是侧面积加上底面积3.14×4×1.2+3.14×（4/2）²，
=3.14×4.8+3.14×4，
=3.14×8.8，
=27.632（平方米）；
2x2x3.14+4x3.14x1.2=12.56+15.072=27.632平方米
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绛旓細闈㈢Н=3.14脳4脳2+3.14脳锛4/2锛²=37.68骞虫柟绫 鍙互钃勬按3.14脳锛4/2锛²脳2=25.12绔嬫柟绫 绁濅綘瀛︿範杩涙锛佸鏈夌枒闂杩介棶锛岀悊瑙ｈ鍙婃椂閲囩撼锛(*^__^*)
绛旓細3.14脳锛4梅2锛 2 脳锛4-0.5锛夛紝 =3.14脳4脳3.5锛 =3.14脳14锛 =43.96锛堢珛鏂圭背锛夛紱 绛旓細杩欎釜钃姘存睜鍙搫姘43.96绔嬫柟绫筹紟
绛旓細搴曢潰绉=3.14*锛4/2锛塣2=12.56骞虫柟绫 渚ч潰绉=3.14*4*1.5=18.84骞虫柟绫 鍒欐婚潰绉=12.56+18.84=31.4骞虫柟绫 闇瑕佹按娉ヤ负 2.5*31.4=78.5鍗冨厠
绛旓細鎶规按娉ラ儴鍒嗙殑闈㈢Н锛 3.14脳4脳3+3.14脳 ( 4 2 ) 2 锛 =12.56脳3+12.56锛 =37.68+12.56锛 =50.24锛堝钩鏂圭背锛夛紱 杩欎釜姘存睜鍙偍姘寸殑浣撶Н锛 3.14脳 ( 4 2 ) 2 脳3锛 =12.56脳3锛 =37.68锛堢珛鏂圭背锛夛紱 绛旓細鎶规按娉ラ儴鍒嗙殑闈...
绛旓細鎸涓涓渾鏌卞舰鐨姘存睜,搴曢潰鐩村緞鏄4绫,娣1.5绫.鍦ㄦ按姹犵殑搴曢潰涓庨噷闈㈠懆鍥存姽涓婃按娉,鎶规按娉ラ儴鍒嗙殑闈㈢Н鏄(31.4)骞虫柟绫宠繖涓按姹犵殑瀹圭Н鏄(18.84)绔嬫柟绫.绗竴闂細搴曢潰绉槸锛3.14脳锛4梅2锛²=12.56骞虫柟绫 渚ч潰绉槸锛3.14脳4脳1.5=18.84骞虫柟绫 鎶规按娉ラ儴鍒嗙殑闈㈢Н鏄細12.56+18.84=31.4...
绛旓細鍗婂緞 4梅2=绫 姘存偿鐨勯潰绉 2x2x3.14+4x3.14x5 =12.56+62.8 =75.36骞虫柟绫
绛旓細銆愯В銆姘存睜瀹圭Н=(4/2)脳(4/2)脳3.14脳2=25.12(绔嬫柟绫筹級姣忓垎閽熸敞姘翠綋绉=(0.04/2)脳(0.04/2)脳3.14脳50=0.0628锛堢珛鏂圭背锛夋敞婊℃按姹犻渶鏃=姘存睜瀹圭Н梅姣忓垎閽熸敞姘翠綋绉=25.12梅0.0628=400锛堝垎閽燂級绛旓細鐏屾弧姘存睜闇瑕400鍒嗛挓銆
绛旓細搴曢潰绉槸 锛4梅2锛²脳3.14锛12.56锛堝钩鏂圭背锛変晶闈㈢Н鏄 4脳3.14脳5锛62.8锛堝钩鏂圭背锛夋姽姘存偿鐨勯潰绉槸 12.56锛62.8锛75.36锛堝钩鏂圭背锛
绛旓細闈㈢Н鐢变袱閮ㄥ垎缁勬垚锛搴曢潰+澧欏 搴曢潰闈㈢Н锛3.14*4=12.56 澧欏闈㈢Н锛氬皢澧欏灞曞紑鐨勮瘽锛屾槸涓涓闀2绫筹紝瀹=搴曢潰鍦嗗懆闀=2*3.14*2=12.56 鍒欏澹侀潰绉=2*12.56=25.12 鍒姘存睜闈㈢Н=12.56+25.12=37.68
