Since A and B are moving in the same direction the faster one takes a lead of one circle over the slower one when they meet for the first time after the start. If A is faster than B: (1) They meet for the first time when A finishes
4
3
rounds and B finishes
1
3
rounds. In this case K =
1
4
and the ratio 1 : K = 4 : 1 (2) They meet for the first time when A finishes
7
3
rounds and B finishes
4
3
rounds. In this case K =
4
7
and the ratio 1 : K = 7 : 4 If B is faster than A: They meet for the first time when A finishes
1
3
rounds and B finishes
4
3
rounds. In this case K = 4 and the ratio 1 : K = 1: 4