19米高的圆柱直径2米有多少立方混泥土？ 桩基深度5米,直径1.5米,需要多少立方混凝土？
\u76f4\u5f842\u7c73\u9ad850\u7c73\u7684\u5706\u6876\u80fd\u88c5\u591a\u5c11\u65b9\u7684\u6df7\u51dd\u571f\u6c34\u7f50\u6309\u5706\u67f1\u4f53\u7b97\u561b\uff0c\u76f4\u5f841.5\uff0c\u534a\u5f840.75\uff0c\u4f53\u79ef\u5c31\u662f0.75\u00d70.75\u00d7\u03c0\u00d75\uff1d2.8125\u03c0
\u5df2\u77e5\uff1a\u6df1\u5ea65\u7c73,\u76f4\u5f841.5\u7c73
\u6c42:\u9700\u8981\u591a\u5c11\u7acb\u65b9\u6df7\u51dd\u571f
\u8ba1\u7b97\uff1a1.5\u00d71.5\u00f74\u00d73.14\u00d75
=2.25\u00f74\u00d73.14\u00d75
=0.5625\u00d73.14\u00d75
=1.76625\u00d75
=8.83125
\u22488.8\u7acb\u65b9\u7c73\uff09
\u7b54\uff1a\u5927\u7ea6\u9700\u8981\u6df7\u51dd\u571f8.8\u7acb\u65b9\u7c73\u3002
需要3.14*1*1*19=59.66立方混凝土~
19*3.14=57+1.9+0.76=60
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绛旓細绛旀鏄細12蟺绔嬫柟绫銆
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绛旓細鍦嗙殑鐩村緞19绫锛岄珮1绫筹紝鍙敤鍦嗘煴鐨勪綋绉叕寮廣=鍏r²h=3.14脳(19/2)²脳1鈮283.4绔嬫柟绫筹紝缁撴灉涓轰竵浣撶Н绾︿负283.4绔嬫柟绫炽
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