Solution: Let the speed of A be x km/h, and the speed of B be (x+2.5) km/h, which is derived from the meaning in the question:

2 hours and 20 minutes =7/3 hours

3 hours and 40 minutes = 1 1/3 hours

(7/3+ 1 1/3)x+ 1 1/3(x+2.5)= 130

6x+ 1 1/3x+55/6 = 130

29/3x=725/6

x= 12.5

12.5+2.5= 15 (km/h)

A: A is 12.5km/h and B is15 km/h. ..