一架飞机从甲城到乙城顺风速度为1800千米每小时从乙城到甲城逆风速度为1000千米,飞机速度和风速? 一架飞机从甲城飞往乙城,2小时飞了1800千米,甲乙两城相距...
\u7532\u3001\u4e59\u4e24\u57ce\u76f8\u8ddd6000\u5343\u7c73\uff0c\u4e00\u67b6\u98de\u673a\u4ece\u7532\u57ce\u98de\u5f80\u4e59\u57ce\uff0c\u987a\u98ce4\u5c0f\u65f6\u5230\u8fbe\uff1b\u4ece\u4e59\u57ce\u8fd4\u56de\u7532\u57ce\uff0c\u9006\u98ce5\u5c0f\u65f6\u5230\u8fbe\u98de\u673a\u901f\u5ea66000\uff0a2/(5+4)=1333.3\u5343\u7c73\u6bcf\u5c0f\u65f6\u3002\u98ce\u901f:6000/4-1333.3=166.7\u5343\u7c73\u6bcf\u5c0f\u65f6\u3002
\u89e3\uff1a1800\u00f72=900\uff0c4500-1800=2700\uff0c2700\u00f7900=3
\u8fd8\u5e94\u98de3\u5c0f\u65f6
则顺风时:v+V=1800
逆风时:V-v=1000
解得V=1400km/h
v=400km/h
绛旓細璁鹃閫熶负v锛岄鏈洪熷害涓篤 鍒欓『椋庢椂锛歷+V=1800 閫嗛鏃讹細V-v=1000 瑙e緱V=1400km/h v=400km/h
绛旓細璁鹃鏈鸿埅閫熸槸X鍗冪背/灏忔椂,鍒欓『椋庨熷害涓(X+24)鍗冪背/灏忔椂,閫嗛閫熷害涓(X-24)鍗冪背/灏忔椂,锛圶+24锛*5.5=(X-24)*6 X=552 涓ゅ煄涔嬮棿鐨勮窛绂绘槸:(552-24)*6=3168
绛旓細椤洪鐨勯熷害鏄細6000梅4=1500锛堝崈绫/灏忔椂锛锛涢嗛鐨勯熷害鏄細6000梅5=1200锛堝崈绫/灏忔椂锛夛紱椋庨燂細锛1500-1200锛壝2=150锛堝崈绫/灏忔椂锛夛紱椋炴満閫熷害锛1500-150=1350锛堝崈绫/灏忔椂锛夌瓟锛氶鏈洪熷害鏄1350鍗冪背/灏忔椂锛岄閫熸槸150鍗冪背/灏忔椂锛
绛旓細璺▼锛4x(1200-120)=4320鍗冪背 杩斿洖锛4320/(1200+120)=36/11灏忔椂
绛旓細鍙緱椤洪閫熷害涓:(24x2)梅(12-11)x12=48x12=576(鍗冪背/鏃)闈欓閫熷害涓:576-24=552(鍗冪背/鏃) 杩介棶 鍙互鐢ㄦ柟绋嬭В鍚? 杩界瓟 瑙:璁鹃潤椋庨熷害涓簒鍗冪背/鏃,鍙緱:6(x-24)=5.5(x+24)6x-144=5.5x+1326x-5.5x=132+1440.5x=276x=552 鏈洖绛旂敱鎻愰棶鑰呮帹鑽 涓炬姤| 璇勮(2) 62 1 ht71020 閲囩撼鐜:59% ...
绛旓細瑙o細璁椋炴満鏃犻鏃閫熷害涓X鍗冪背/鏃讹紝渚濋鎰忓緱锛5.5锛圶+24)=6(X-24)寰楀嚭 X=522 鍒欙紱涓ゅ煄璺濈涓 锛522-24锛*6=3168锛堝崈绫筹級
绛旓細瑙o細椤洪姣忓皬鏃 540+60=600鍗冪背 閫嗛姣忓皬鏃 540-60=480鍗冪背 鐢蹭付涔涓ゅ煄闂寸殑璺濈鏄 锛600+480锛墄9=9720鍗冪背 绛旓細鐢蹭付涔欎袱鍩庨棿鐨勮窛绂绘槸9720鍗冪背銆
绛旓細璁椋炴満鍦ㄩ潤椋庝腑鐨閫熷害鏄x 鍗冪背/鏃,寰 5.5锛坸+24) = 6(x - 24) ( 鐢,涔涓ゅ煄鐨勮矾绋嬫槸涓嶅彉鐨,椤洪閫熷害*椤洪鏃堕棿=閫嗛閫熷害*閫嗛鏃堕棿锛5.5x + 132= 6x - 144 0.5x= 276 x=552 鎵浠,鐢,涔欎袱鍩庣殑璺濈鏄細5.5*锛552+24)=5.5 * 576 = 3168 锛堝崈绫筹級濂藉ソ鍔姏鍝!鏈熷緟鐫浣犵殑杩涙...
绛旓細璁椋炴満鐨閫熷害涓x鍗冪背/灏忔椂锛椋庨涓簓鍗冪背/灏忔椂锛屽垯鍙垪鍑烘柟绋嬶細2.5锛坸+y锛=1200 31/30锛坸-y锛=1200
绛旓細瑙o細璁椋炴満鍦ㄩ潤椋庝腑鐨閫熷害鏄x 鍗冪背/鏃讹紝寰 5.5锛坸+24) = 6(x - 24) ( 鐢,涔涓ゅ煄鐨勮矾绋嬫槸涓嶅彉鐨勶紝椤洪閫熷害*椤洪鏃堕棿=閫嗛閫熷害*閫嗛鏃堕棿锛5.5x + 132= 6x - 144 0.5x= 276 x=552 鎵浠ワ紝鐢,涔欎袱鍩庣殑璺濈鏄細5.5*锛552+24)=5.5 * 576 = 3168 锛堝崈绫筹級濂藉ソ鍔姏鍝︼紒...