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標題:
數學問題(兩地之間的距離)
發問:
甲車速度48千米/小時, 乙車速度36千米/小時.兩車同時間出發從A地到B地, 甲車途中修車3小時, 結果同時到達, 求AB兩地之間的距離?~
最佳解答:
設AB距離x x/48+3=x/36 x/36-x/48=3 48x/1728-36x/1728=3 12x/1728=3 x/144=3 x=432千米(km)
let x h be the time that car A is traveling. x + 3 is the total used time 48x is the total distance travelled by A 36( x+3) is total distance travelled by B AS they should be equal so. 48x = 36(x +3) after solving. x=1/9 required distance = 1/9 times 48 =16/3 km 2010-05-24 23:18:00 補充： sorry x should be equal to 9 so required distance should be 9 times 48 = 432 km|||||甲車速度48千米/小時, 途中停下修車3小時, 行駛9小時, 48x9=432 乙車速度36千米/小時, 3+9=12, 行駛12小時, 36x12=432 AB兩地之間的距離=432kM|||||把................................................................................................................ 36千米x4=答案=我想?野=龘=哈哈=Orz=@_@=*_*=:-]=$_$=%_%=唔知想Dwhat !!!!!!!!!!!!!!!!!!!!!!!!!
數學問題(兩地之間的距離)
發問:
甲車速度48千米/小時, 乙車速度36千米/小時.兩車同時間出發從A地到B地, 甲車途中修車3小時, 結果同時到達, 求AB兩地之間的距離?~
最佳解答:
設AB距離x x/48+3=x/36 x/36-x/48=3 48x/1728-36x/1728=3 12x/1728=3 x/144=3 x=432千米(km)
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其他解答:let x h be the time that car A is traveling. x + 3 is the total used time 48x is the total distance travelled by A 36( x+3) is total distance travelled by B AS they should be equal so. 48x = 36(x +3) after solving. x=1/9 required distance = 1/9 times 48 =16/3 km 2010-05-24 23:18:00 補充： sorry x should be equal to 9 so required distance should be 9 times 48 = 432 km|||||甲車速度48千米/小時, 途中停下修車3小時, 行駛9小時, 48x9=432 乙車速度36千米/小時, 3+9=12, 行駛12小時, 36x12=432 AB兩地之間的距離=432kM|||||把................................................................................................................ 36千米x4=答案=我想?野=龘=哈哈=Orz=@_@=*_*=:-]=$_$=%_%=唔知想Dwhat !!!!!!!!!!!!!!!!!!!!!!!!!
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