塑料车间空气净化原理:帮忙做一道英文的数学题
来源:百度文库 编辑:查人人中国名人网 时间:2024/05/14 03:03:48
Jone and his brother go to a mountain. Jone wants to know how far the mountain is from their home. His brother says, "if we go 6 kilometers an hour, we can get there at eleven o'clock. If we go 4 kilometers an hour, we can get there at 12:30."
Can you tell me how far the mountain is from Jone's house?
各位大哥大姐,帮忙!要有解题过程哦!12分的感谢!
Can you tell me how far the mountain is from Jone's house?
各位大哥大姐,帮忙!要有解题过程哦!12分的感谢!
如果一小时走6KM, 11点到
如果一小时走4KM, 12点半到.
路程相同.
s=vt.
设出发时间为X.
6*(11-X)=4*(12.5-X)
X=8
所以S=6*(11-8)=18KM
18 kilometers
设出发时间为x 总路程为y
得出:(11-x)×6=y
(12.5-x)×4=y
解出 x=8 y=18
11-X/6=12.5-X/4
X=18KM
(11-X/6)stands for the time that they talked .
18kilometers
设每小时走6公里到山需要x个小时
得出:6x=4(x+1.5) 推出x=3
3×6=18
设以6km/h的速度走时所花的时间为X 那么以4km/h的速度走时所花的时间为X+1.5 6×X=4×(X+1.5) 所以X=3 所以距离=6km/h×3h=18km
假设一小时6km,走了X小时到目的地,那一小时走4km的时候就需要(X+1.5)小时,所以得出
6X=4(X+1.5)
算出X=3
所以家到山的距离就是6×3=18km.