Junior high school math application problem: the problem of meeting the express train and the local train!

For this kind of problem, we need to find out the distance, time and speed of meeting.

Meet in the same direction, meet speed = speed difference between two cars,

Meet, meet speed = the sum of the speeds of two cars,

The distance of meeting is as long as two cars. According to the above ideas, the solution of the equation is listed.

Let the express speed be x m/s and the local speed be y m/s,

180+ 170 =(x+y)× 10

180+ 170=(x-y)×35

Solution:

x=22.5 y= 12.5