查人人中国名人网马鞍山到宿州的汽车:一个英语的思考题！
来源：百度文库 编辑：查人人中国名人网 时间：2024/04/29 15:50:08
John and his brother go to a mountain. John 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 kiloweters an hour,we can get there at 12:30.”
问题：Can you tell how far the mountain is from John's house?
问题：Can you tell how far the mountain is from John's house?
If you premise the distance between the mountain and John's house is "X" km(kilometer)
You will have a expression,like this:
X/4-X/6=1.5
resolvent: X=18(kilometer)
So, the answer is 18 kilometer!
设出发的时间为X 然后根据题设列出方程:
(11-x)*6=(12.5-x)*4
解得 x=8
可以知道他们出发的时间为8点
由任意一个条件就可以得知山离他们的房子18公里
设距离为x千米
x/4-x/6=1.5
x=18km
距离为18千米