(一个圆柱形水池,水池内壁和地面都要向上瓷砖.水池的底面直径是6cm,池深1.5m.占地面积是多少平方米? 在一个圆柱形水池水池内壁和底面都要贴上瓷砖,已知水池底面直径...
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6\u00d73.14\u00d71.5\uff1d28.36\u5e73\u65b9\u7c73
3.14\u00d73\u00d73\uff1d28.26\u5e73\u65b9\u7c73
28.26+28.26\uff1d56.52\u5e73\u65b9\u7c73
1.5m=150cm
6×150=900
900+28.26=928.26cm²
928.26cm²=0.092826m²
是不是:一个圆柱形水池,水池内壁和地面都要向上瓷砖.水池的底面直径是6m,池深1.5m.贴瓷砖面积是多少平方米?
解:3.14×6×1.5+3.14×6/2×6/2=56.52(平方米)
绛旓細3.14x3x3+3.14x6x1.2=50.868m2 50.868x(1+0.07)x25=1360.72鍏 澶囨敞锛氱摲鐮栭潰绉渶瑕佺畻涓婃崯鑰楋紙鎸夊钩闈㈢畻鐨勶級
绛旓細瑙o細鎶规按娉ョ殑闈㈢Н搴旀槸渚ч潰绉姞涓婂簳闈㈢Н 3.14脳4脳1.2+3.14脳锛4/2锛²锛=3.14脳4.8+3.14脳4锛=3.14脳8.8锛=27.632锛堝钩鏂圭背锛夛紱
绛旓細搴曢潰闈㈢Н锛歋=3.14脳(6梅2)^2=28.26骞虫柟绫锛屽唴澹闈㈢Н锛歋渚=3.14脳6脳1.2=22.608骞虫柟绫筹紝闀剁爾闈㈢Н锛28.26+22.608=50.868骞虫柟绫炽傜患鍚堢畻寮忥細3.14脳锛(6梅2)^2+6脳1.2)锛=3.14脳16.2 =50.868骞虫柟绫炽
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
绛旓細搴曢潰鍗婂緞=4梅2=2锛堢背锛夊簳闈㈢Н=2²脳3.14=12.56锛堢背²锛夊簳闈㈠懆闀=4脳3.14=12.56锛堢背锛変晶闈㈢Н=搴曢潰鍛ㄩ暱脳娣=12.56脳1.5=18.84锛堢背²锛夌矘鐡风爾閮ㄥ垎鐨勯潰绉槸锛氬簳闈㈢Н+渚ч潰绉=12.56+18.84=31.4锛堢背²锛
绛旓細3.14脳4²=50.24骞虫柟绫 3.14脳4脳2脳2.5=62.8骞虫柟绫 50.24+62.8=113.04骞虫柟绫=1130400骞虫柟鍘樼背 璐寸摲鐮栭潰绉槸1130400骞虫柟鍘樼背
绛旓細鐩村緞鏄5绫冲惂 鍗婂緞鏄5梅2=2.5绫 鎵浠ユ槸3.14脳2.5脳2.5+3.14脳5脳1.5=43.175骞虫柟绫
绛旓細搴曢潰鍗婂緞鏄 10梅2锛5锛堢背锛夊簳闈㈢Н鏄 5脳5脳3.14锛78.5锛堝钩鏂圭背锛変晶闈㈢Н鏄 10脳3.14脳6锛188.4锛堝钩鏂圭背锛夌摲鐮栫殑闈㈢Н鏄 78.5锛188.4锛266.9锛堝钩鏂圭背锛
绛旓細涓涓渾鏌卞舰钃姘存睜锛浠庨噷闈㈤噺搴曢潰鍛ㄩ暱鏄31.4锛屾繁2绫筹紝鍦ㄥ畠鐨鍐呭涓鍦伴潰鎶逛笂姘存偿銆傛姽姘存偿鐨勯儴鍒嗛潰绉槸澶氬皯骞虫柟绫筹紵31.4梅3.14梅2=5 31.4x2+3.14x5x5 =62.8+78.5 =141.3骞虫柟绫 2.钃勬按姹犺兘钃勬按澶氬皯鍚紵锛堟瘡绔嬫柟姘撮噸涓鍚級3.14x5x5x2=157绔嬫柟绫 157x1=157鍚 ...
绛旓細31.4梅(2脳3.14)=5 5²脳3.14+31.4脳2.4=78.5+75.36=153.86骞虫柟绫 濡傛灉婊℃剰璁板緱閲囩撼鍝︼紒浣犵殑濂借瘎鏄垜鍓嶈繘鐨勫姩鍔涖(*^__^*) 鍢诲樆鈥︹︽垜鍦ㄦ矙婕犱腑鍠濈潃鍙彛鍙箰锛屽敱鐫鍗℃媺ok锛岄獞鐫鐙瓙璧剁潃铓傝殎锛屾墜涓嬁鐫閿洏涓轰綘绛旈锛侊紒锛