Party A and Party B walk on the 400 meter long circular runway at the same time with their backs on the same ground. Party A travels one meter more per second than Party B. if they meet each other for the first time Use 25 seconds to find the speed of two people (use the equation!)

Let B be x meters per second, then a be (x + 1) meters per second
x+（x+1）=400/25
The solution is x = 7.5
A is x + 1 = 8.5

Party A and Party B started from a point a of the 400 meter circular runway with their backs at the same time. Ten minutes later, they walked 0.1 meters more than Party B for the fifth time
Party A and Party B set out from a point a of the 400 meter circular runway with their backs at the same time. Ten minutes later, they met for the fifth time. It is known that a travels 0.1 meters more per second than B, so what is the shortest distance along the runway between the point a and the place where they met for the fifth time

Suppose B's speed is x m / s, then a is x + 0.1, then 10 * 60x + 10 * 60 (x + 0.1) = 400 * 51200x + 60 = 2000x = 97 / 60, so B ran a total of 1200X = 1940m, and the distance from a is 1940-4 * 400 = 1940-1600 = 340m or 5 * 400-1940 = 2000-1940 = 60m

A and B start from point a with their backs facing each other at the same time and walk along the 400 meter circular runway. A walks 80 meters per minute and B walks 50 meters per minute______ We'll meet again at a in ten minutes

Starting from point a, it takes a circle of 400 △ 80 = 5 (minutes) for a and a circle of 400 △ 50 = 8 (minutes) for B. the least common multiple of 5 and 8 is 40. So it takes at least 40 minutes for a and B to meet at point a

Party A and Party B travel from AB to each other at the same time. It takes six hours for Party A to finish the whole journey. Four hours later, they meet. Party A and Party B travel 18 kilometers more than Party B,
Find the speed of B

When meeting, a line of the whole: 4 / 6 = 2 / 3, then B line of the whole: 1 / 3
Therefore, the whole distance is: 18 / (2 / 3-1 / 3) = 54 km
The speed sum of a and B is 54 / 4 = 27 / 2km / h, and that of a is 54 / 6 = 9km / h
Therefore, the speed of B is: 27 / 2-9 = 4.5 km / h

Party A and Party B walk on the 400 meter long circular runway at the same time with their backs on the same ground. Party A travels one meter more per second than Party B. if they meet each other for the first time Use 25 seconds to find the speed of two people (use the equation!)