一道英语奥数题:The distance between A and B is 10km .A ship sails from A to B,then B to A at once .The total time is 3hours .WE know the distance in its first hour is 8km is more than that in its third hour .So the water speed is _________?

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一道英语奥数题:The distance between A and B is 10km .A ship sails from A to B,then B to A at once .The total time is 3hours .WE know the distance in its first hour is 8km is more than that in its third hour .So the water speed is _________?
一道英语奥数题:The distance between A and B is 10km .A ship sails from A to B,
then B to A at once .The total time is 3hours .WE know the distance in its first hour is 8km is more than that in its third hour .So the water speed is _________?

一道英语奥数题:The distance between A and B is 10km .A ship sails from A to B,then B to A at once .The total time is 3hours .WE know the distance in its first hour is 8km is more than that in its third hour .So the water speed is _________?
A和B之间的距离为10千米,一艘船从A港驶向B港,然后立即掉头从B港返回A港,总共用时3小时,第一个小时行驶的距离比第三个小时行驶的距离多8千米,请问:水流速度是多少?
给分吧.

从A到B总共需要3小时,第一个小时行驶了8KM,而且第一个小时行驶的距离比第三个小时长,请问:水流的速度是多少?请列出解题过程可以吗?我靠,我不是奥数天才诶 你只负责翻译 答案是8/7KM每小时 顺水速度是8KM/小时,于是剩下的两千米的时间就是2/8=1.25小时 速度比=时间的反比 设水流速度为S得方程 1.25/(3-1.25)=8/8-2s...

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从A到B总共需要3小时,第一个小时行驶了8KM,而且第一个小时行驶的距离比第三个小时长,请问:水流的速度是多少?

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我想翻译已经有了
解法:设水速为x,船速为y
!若前一小时未到达b
∵第一个小时行驶的距离比第三个小时行驶的距离多8千米
∴y+x=y-x+8 x=4

!!若前一小时到达b并返回
有10/(y+x) +10/(y-x)=3
10+[1-10/(y+x)]×(y-x)...

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我想翻译已经有了
解法:设水速为x,船速为y
!若前一小时未到达b
∵第一个小时行驶的距离比第三个小时行驶的距离多8千米
∴y+x=y-x+8 x=4

!!若前一小时到达b并返回
有10/(y+x) +10/(y-x)=3
10+[1-10/(y+x)]×(y-x)=8+(y-x)
∴x= 8 y=12
综上,水速为4或8
谢谢

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