1, meeting distance = speed x meeting time.

2, meet time = meet distance ÷ speed and

3. Speed sum = meeting distance ÷ meeting time

4. Meeting distance = A distance +B distance.

5. the speed of a = meeting distance ÷ meeting time-the speed of b.

6. the distance of a = the distance of meeting-the distance of b.

Extended data

Example 1

The waterway from Nanjing to Shanghai is 392 kilometers long. At the same time, ships from each port run relative to each other. Ships from Nanjing run 28 kilometers per hour, while ships from Shanghai run 2 1 kilometer per hour. How many hours passed before the two ships met?

Solution 392÷(28+2 1)=8 (hours)

A: Eight hours later, the two ships met.

Example 2

Xiao Li and Xiao Liu are running on a 400-meter-long circular track. Xiao Li runs 5 meters per second and Xiao Liu runs 3 meters per second. They started from the same place at the same time and ran in the opposite direction. So, how long will it take them to meet for the second time?

The second meeting can be understood as two people running two laps. So the total distance is 400×2.

Meeting time =(400×2)÷(5+3)= 100 (seconds)

A: It takes 100 seconds for them to meet for the second time.