2. The speed of A is 1.45 times that of B, that is, 4.35 km/h. Let's assume that A walked t hours to reach its destination.
The total length calculated by A is 4,35 * t, Otsuichi * * * walked t+0.5 hours to the destination, and the total length calculated by B is 35*t (t+0.5).
So 4.35*t=3*(t+0.5), and the solution is t =1.11hour, so the total length is1.1.