一个长方体的蓄水池，长5米，宽3米，深1.2米，水龙头每分钟往池内放200立方分米谁，多长时间水面高一米
\u623f\u9876\u6709\u4e00\u4e2a\u957f\u65b9\u4f53\u84c4\u6c34\u6c60,\u957f8\u7c73.\u5bbd5\u7c73,\u9ad84\u7c73,\u6c34\u6c60\u91cc\u9762\u6c34\u6df12\u7c73\uff0c\u8fd9\u4e2a\u6c34\u6c60\u6709\u6c34\u591a\u5c11\u7acb\u65b9\u4f60\u597d\uff1a
8\u00d75\u00d72
=8\u00d710
=80\u7acb\u65b9\u7c73
\u7b54\uff1a\u8fd9\u4e2a\u6c34\u6c60\u6709\u6c3480\u7acb\u65b9\u7c73\u3002
\u5f88\u9ad8\u5174\u4e3a\u60a8\u89e3\u7b54\uff0c\u795d\u4f60\u5b66\u4e60\u8fdb\u6b65\uff01\u3010\u3011\u56e2\u961f\u4e3a\u60a8\u7b54\u9898\u3002
\u6709\u4e0d\u660e\u767d\u7684\u53ef\u4ee5\u8ffd\u95ee\uff01\u5982\u679c\u60a8\u8ba4\u53ef\u6211\u7684\u56de\u7b54\u3002
\u8bf7\u70b9\u51fb\u4e0b\u9762\u7684\u3010\u9009\u4e3a\u6ee1\u610f\u56de\u7b54\u3011\u6309\u94ae\u3002
\u5982\u679c\u6709\u5176\u4ed6\u95ee\u9898\u8bf7\u53e6\u53d1\u6216\u70b9\u51fb\u5411\u6211\u6c42\u52a9\uff0c\u7b54\u9898\u4e0d\u6613\uff0c\u8bf7\u8c05\u89e3\uff0c\u8c22\u8c22\uff01
\u4e0d\u51b7\u7684\u5b89\u903894\uff0c\u4f60\u597d\uff1a
\u6b63\u65b9\u4f53\u5e95\u9762\u79ef\uff1a5\u00d75\uff1d25\uff08\u5e73\u65b9\u5206\u7c73\uff09
\u5c0f\u957f\u65b9\u4f53\u9ad8\u4e3a\uff1a100\u00f725\uff1d4\uff08\u5206\u7c73\uff09
\u539f\u6765\u957f\u65b9\u4f53\u9ad8\uff1a5\uff0b4\uff1d9\uff08\u5206\u7c73\uff09
\u539f\u6765\u8868\u9762\u79ef\u662f\uff1a2\u00d7\uff085\u00d75\uff0b5\u00d79\uff0b5\u00d79\uff09\uff1d230\uff08\u5e73\u65b9\u5206\u7c73\uff09
200dm3=0.2m3,5*3*1=15,15/0.2
要 75分钟
绛旓細锛1锛5脳4=20锛堝钩鏂圭背锛夌瓟锛钃勬按姹鐨勫崰鍦伴潰绉槸20骞虫柟绫筹紟锛2锛塠5脳4+锛5脳2.5+4脳2.5锛壝2]脳20.4 =锛20+45锛壝20.4 =65脳20.4 =1326锛堝崈鍏嬶級绛旓細涓鍏辫鐢ㄦ按娉1326鍗冨厠锛庯紙3锛5脳4脳2.5=50锛堢珛鏂圭背锛夌瓟锛氳繖涓搫姘存睜鏈澶氬彲浠ヨ搫姘50绔嬫柟绫筹紟
绛旓細5绫脳3绫趁1绫=15绔嬫柟绫筹紝2脳(5脳3+3脳1+1脳5)-5脳3 =2脳23-15 =46-15 =31 31脳6=186 瀹冩渶澶氬彲钃勬按15绔嬫柟绫筹紝姣忓钩鏂圭背鐢6kg姘存偿锛屼竴鍏遍渶瑕186kg姘存偿銆
绛旓細5脳3.1=15.5锛堝钩鏂圭背锛夛紝5脳3.1脳1.5=23.25锛堢珛鏂圭背锛夛紝绛旓細杩欎釜钃勬按姹鐨勫崰鍦伴潰绉槸15.5骞虫柟绫筹紝鑳借搫姘23.25绔嬫柟绫筹紟鏁呯瓟妗堜负锛15.5骞虫柟绫筹紝23.25锛
绛旓細5脳3=15锛堝钩鏂圭背锛夌瓟锛氳繖涓钃勬按姹鐨勫崰鍦伴潰绉槸15骞虫柟绫筹紟鏁呴夛細C锛
绛旓細3. 涓涓暱鏂逛綋鐨搴曢潰绉槸4.5骞虫柟鍘樼背锛岄珮鏄5鍒嗙背锛屽畠鐨勪綋绉槸锛 225 锛夌珛鏂瑰帢绫炽4. 涓涓暱鏂逛綋钃勬按姹犻暱5绫筹紝瀹3.1绫筹紝楂1.5绫筹紝杩欎釜钃勬按姹犵殑浣撶Н鏄紙23.25 锛夌珛鏂圭背锛岃兘钃勬按锛23250 锛夊崌銆5. 涓涓暟澧炲姞20%鍚庢槸360锛岃繖涓暟鏄紙300 锛夈6. 鐢2涓１闀挎槸1.2鍘樼背鐨勬鏂...
绛旓細15.5骞鏂圭背
绛旓細45000鍗囨槸浠栫殑瀹圭Н涔熷氨鏄浉褰撲簬浠栫殑浣撶Н锛屾棦鐒堕暱鍜屽閮界‘瀹氫簡灏辨槸宸繁搴锛岄暱鏂逛綋鐨浣撶Н璁＄畻鍏紡鏄暱涔樺涔橀珮锛屼竴鍗囩瓑浜0.001绔嬫柟绫筹紝鎵浠ヤ綋绉槸45绔鏂圭背銆傞偅鏃㈢劧闀夸箻瀹戒箻楂樼瓑浜45锛岄暱鍜屽鍒嗗埆鏄5锛岄偅涔堝氨鏄渶瑕佺畻鍑洪珮鏄45/5/5=1.8绫筹紝閭ｅ氨鏄鎸1.8绫虫繁銆
绛旓細15銆 涓涓暱鏂逛綋钃勬按姹,闀12绫,瀹8绫,楂4绫,濡傛灉灏嗗洓澹佸拰鍦伴潰鐢4骞虫柟鍒嗙背鐨勬鏂瑰舰鐡风爾璐翠笂,闇瑕佸灏戝潡?16銆 鎶婁竴鍧楁１闀1.2绫崇殑姝ｆ柟浣撻挗鍧敾鎴愭í鎴潰闈㈢Н鏄0.04骞虫柟绫崇殑闀挎柟浣撻挗鏉,閿绘垚鐨勯挗鏉愭湁澶氶暱?17銆 涓涓暱鏂逛綋鐨闀挎槸15鍘樼背,瀹芥槸12鍘樼背,妫遍暱鎬诲拰鏄148鍘樼背,瀹冪殑楂樻槸澶氬皯? 18銆 涓涓暱鏂逛綋娌圭,...
绛旓細鍗犲湴闈㈢Н锛15脳5=75锛堝钩鏂圭背锛夛紙15脳5脳3锛壝6 =225梅6 =37.5锛堝垎锛
绛旓細瑙ｏ細杩欎釜钃勬按姹鍗犲湴闈㈢Н鏄細12脳5锛60骞虫柟绫筹紝瀹冩渶澶氬彲钃勬按锛60脳1.6锛96绔嬫柟绫
