一个压路机的前轮是圆柱形，轮宽1.5米，直径1.2米。前轮转动一周，压路的面积多少 一台压路机的前轮是圆柱形，轮宽1.5米，直径是1.2米，前轮...
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\u6240\u4ee5\u538b\u8fc7\u8def\u7a0b\u7684\u957f\u4e3a\uff1a1.2*\u03c0\u22483.769
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1.\u8fde\u63a5\u5706\u5fc3\u548c\u5706\u4e0a\u7684\u4efb\u610f\u4e00\u70b9\u7684\u7ebf\u6bb5\u53eb\u505a\u534a\u5f84\uff0c\u5b57\u6bcd\u8868\u793a\u4e3ar\uff08radius\uff09
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3.14\u00d71.2\u00d74\u00d71.5\uff0c=3.768\u00d76\uff0c=22.608\uff08\u5e73\u65b9\u7c73\uff09\uff1b\u7b54\uff1a\u538b\u8def\u7684\u9762\u79ef\u662f22.608\u5e73\u65b9\u7c73\uff0e\u6545\u7b54\u6848\u4e3a\uff1a22.608\uff0e
前轮转动一周的压路面积 := 前轮转一周的表面面积
= 圆周 x 前轮宽度
= π x 直径 x 前轮宽度
= {3.1416 x 1.2 } x 1.5
= 5.655 平米
3.14×1.2×1.5=5.625
1.5×1.2×3.14×1=5.652（米）
s=1.5x1.2x3.14=5.652平方米
绛旓細锛1锛夊洜涓哄渾鐨勫懆闀匡細 锛坉鐩村緞锛宺鍗婂緞锛夛紱鎵浠ュ帇杩囪矾绋嬬殑闀夸负锛1.2*蟺鈮3.769 鍥犱负闀挎柟褰(鐭╁舰锛夛細 {闀挎柟褰㈤潰绉=闀棵楀}锛涙墍浠ュ帇杩囩殑璺潰鏄3.769*1.5鈮5.654骞虫柟绫炽傦紙2锛夋瘡鍒嗛挓杞姩15鍛紝鍘嬭繃鐨勮矾闈㈡槸84.75骞虫柟绫炽5.654脳15=84.81锛堝钩鏂圭背锛...
绛旓細鐞嗘竻鎬濊矾:鍘嬭矾鏈哄墠杞槸涓渾鏌变綋锛鍘嬭矾鐨勯潰鏄渾鏌辩殑渚ч潰锛屾墍浠ヨ繖閬撻鏄眰鍦嗘煴鐨勪晶闈㈢Н锛岀敱浜庢瘡鍒嗛挓婊5鍦堬紝涔熷氨鏄晶闈㈢Н鐨5鍊嶃杞灏辨槸鍦嗘煴鐨勯珮锛屾墍浠ヨ繖閬撻鏄凡鐭ュ簳闈㈢洿寰勫拰楂樻眰渚ч潰绉傚垪寮:V=蟺dh=3.14脳1.5脳0.8=3.14脳1.2=3.768(骞虫柟绫)锛3.768脳5=18.84(骞虫柟绫)寤鸿鍒楃患鍚...
绛旓細鍛ㄩ暱=3.14脳0.8=2.512绫 2.512脳1.6=4.0192骞虫柟绫 绛旓細鍘嬭矾鐨闈㈢Н鏄4.0192骞虫柟绫
绛旓細鍓嶈疆姣忚浆鍔ㄤ竴鍛ㄥ帇杩囩殑闈㈢Н锛歴=蟺dl=3.14*1.2*1.5=5.652锛坢²锛夊墠杞竴灏忔椂杞姩鐨勫懆鏁帮細n=20*60=1200 涓灏忔椂鍘嬭繃鐨勯潰绉細S=ns=5.652*1200=6782.4锛坢²锛夋湜閲囩撼锛岃阿璋紒
绛旓細鍓嶈疆姣忚浆鍔ㄤ竴鍛ㄥ帇杩囩殑闈㈢Н锛歴=蟺dl=3.14*1.2*1.5=5.652锛坢²锛夊墠杞竴灏忔椂杞姩鐨勫懆鏁帮細n=20*60=1200 鈭翠竴灏忔椂鍘嬭繃鐨勯潰绉細S=ns=5.652*1200=6782.4锛坢²锛
绛旓細鍓嶈疆杞姩涓鍛ㄥ帇杩囩殑璺潰鏄細3.14脳1.2脳1.5=5.652骞虫柟绫 鍓嶈疆姣忓垎閽熷帇杩囩殑璺潰鏄細5.652脳20=113.04骞虫柟绫 杩欎釜鍘嬭矾鏈涓鐩村悜鍓嶅紑,1灏忔椂鍓嶈疆鍘杩鐨璺潰鏄細113.04脳60=6782.4骞虫柟绫
绛旓細鍘嬭矾鐨闈㈢Н鏄7.536骞虫柟绫炽傝В绛旇繃绋嬪涓嬶細闀垮害=蟺D=3.14X1.2=3.768锛堢背锛塖=闀垮害X瀹=3.768X2=7.536锛堝钩鏂圭背锛夌瓟锛氬帇璺殑闈㈢Н鏄7.536骞虫柟绫炽
绛旓細鍓嶈疆鐨鍛ㄩ暱鏄=蟺脳1.2=3.14脳1.2=3.768绫 杞殑渚ч潰绉氨鏄=3.768脳瀹=3.768脳2=7.536骞虫柟绫 姣忚浆鍔ㄤ竴鍛紝鍓嶈繘3.768绫锛屽帇璺殑闈㈢Н鏄7.536骞虫柟绫
绛旓細瑙ｏ細1脳3.14脳10脳60脳2=3768骞虫柟绫 绛旓細瀹冩瘡灏忔椂鍙鍘嬭矾闈3768骞虫柟绫炽
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