一个圆柱高1.8米，直径30公分，它立方米是多少？物流同的计算，在线等，谢谢各位 重100斤 圆柱高1.22米，体积一立方米，求直径，在线等
\u4e00\u4e2a\u76f4\u5f84\u4e3a1.8\u7c73\u3001\u9ad830\u7c73\u7684\u5706\u67f1,\u4f53\u79ef\u7b97\u5f0f\u600e\u6837\u7acb,\u4f53\u79ef\u662f\u591a\u5c11\u5706\u67f1\u4f53\u79ef\u516c\u5f0f\u662f\u7528\u4e8e\u8ba1\u7b97\u5706\u67f1\u4f53\u4f53\u79ef\u7684\u516c\u5f0f\u3002
\u5706\u67f1\u4f53\u79ef=\u03c0 r² h
=s\u5e95 h
\u5148\u6c42\u5e95\u9762\u79ef\uff0c\u7136\u540e\u4e58\u4ee5\u9ad8
V=3.14*\uff080.9*0.9\uff09*30=76.302 \u7acb\u65b9\u7c73
\u5e95\u9762\u79ef=1\u7acb\u65b9\u7c73/1.22=0.82\u5e73\u65b9\u7c73
\u534a\u5f84\u7684\u5e73\u65b9*3.14=0.82\u5e73\u65b9\u7c73
\u534a\u5f84\u7684\u5e73\u65b9=0.261
\u534a\u5f84=\u6839\u53f7\u4e0b0.261=0.51\u7c73
\u76f4\u5f84=\u534a\u5f84*2=0.51*2=1.02\u7c73
圆柱的体积=底面积×高=πr^2*H
3.14×0.3/2×0.3/2×1.8=0.12717立方米
绛旓細30鍘樼背=0.3绫 鍥犱负鐑熷洷鍙湁渚ч潰 鎵浠ラ潰绉渶灏忔槸 3.14*0.3*2=1.884骞虫柟绫
绛旓細=3.14*15^2*60=42390绔嬫柟鍘樼背=42.39鍗囷紝鍙互鐩42.39鍗囨按銆
绛旓細鍥犱负鏄寜鐓1:100鍋氭垚寰皬妯″瀷 鎵浠ユā鍨嬬殑搴曢潰鐩村緞锛歞=30/100=0.3(绫)妯″瀷鐨勯珮锛歨=20/100=0.2(绫)鎵浠ユā鍨嬬殑琛ㄩ潰绉細S= 2*S搴+S渚ч潰 = 2*蟺*r搴*r搴+C搴*h = 2*3.14*(0.3/2)*(0.3/2)+3.14*0.3*0.2 = 0.1413+0.1884 = 0.3297(骞虫柟绫)...
绛旓細鏍规嵁棰樻剰锛屾ā鍨嬬殑琛ㄩ潰绉=2脳3.14脳0.15脳0.15+2脳3.14脳0.15脳0.2=0.3297骞虫柟绫
绛旓細濡傛灉鐩村緞鍜岄珮鏄粠鍐呴噺鐨勶紝鍒 鍗婂緞鏄0.8梅2=0.4(绫)3.14脳0.4脳0.4脳1.8鈮0.9(绔嬫柟绫)杩欎釜鍦嗘煴浣撴《鑳藉绾0.9绔嬫柟绫虫按銆
绛旓細涓撳鏉ヨ锛氭棰樿浆鎹㈡垚姹鍦嗘煴鐨勮〃闈㈢Н 搴曢潰鍗婂緞锛30梅2=15(鍘樼背)搴曢潰绉細15²脳3.14=706.5(骞虫柟鍘樼背)搴曢潰鍛ㄩ暱锛30脳3.14=94.2(鍘樼背)渚ч潰绉細94.2脳12=1130.4(骞虫柟鍘樼背)琛ㄩ潰绉細706.5脳2+1130.4 =1413+1130.4 =2543.4(骞虫柟鍘樼背)绛旓細鑷冲皯瑕2543.4骞虫柟鍘樼背鐨勭焊鏉 ...
绛旓細鍗婂緞鍜岄珮閮芥槸15绫 琛ㄩ潰绉槸 3.14脳(15²脳2+30脳15)=2826骞虫柟绫 浣撶Н鏄 3.14脳15²脳15=10597.5绔嬫柟绫
绛旓細鍦嗘煴褰㈡按鏉殑鍗婂緞=30梅2锛15鍘樼背锛屽渾鏌褰㈡按鏉殑搴曢潰绉=3.14脳15脳15锛 706.5骞虫柟鍘樼背锛屽绉槸=搴曢潰绉楅珮锛706.5脳40=28260绔嬫柟鍘樼背=28260姣崌锛岀瓟锛氭按鏉殑瀹圭Н鏄28260姣崌锛
绛旓細鍗婂緞=15鍘樼背 楂=60鍘樼背 琛ㄩ潰绉 =2脳3.14脳15²+2脳3.14脳15脳60 =7065骞虫柟鍘樼背
绛旓細鍦嗘煴鐨勪綋绉=搴曢潰绉楅珮=蟺r^2*H 搴曢潰鍗婂緞鏄細30/2=15鍘樼背 1绔嬫柟鍘樼背=0.001鍗 3.14脳15脳15脳50 =35325绔嬫柟鍘樼背 =35.325鍗 淇濈暀鏁存暟锛屽彇35銆傜瓟锛氭渶澶氳兘鐩涙按35鍗囥倊绁濆涔犺繘姝ャ
