How long after the meeting of cars traveling in the opposite direction, the distance between them will be equal to 200 m

How long after the meeting of cars traveling in the opposite direction, the distance between them will be equal to 200 m, if the speed of the first is 25 m / s, and the second 108 km / h?

Initial data: S (required distance between cars) = 200 m; V1 (speed of the first car) = 25 m / s; V2 (speed of the second car) = 108 km / h.

SI system: V2 = 108 m / s = 30 m / s.

1) The speed with which the distance between cars will increase after the meeting: V = V1 + V2 = 25 + 30 = 55 m / s.

2) The required time of movement of vehicles: t = S / V = 200/55 ≈ 3.64 s.

Answer: After the meeting, the cars will have to move 3.64 c.