From cities A and B, located on a straight highway, two cars simultaneously leave towards each other with speeds vA = 100 km/h and vB = 60 km/h. The distance between cities is L = 120 km (Fig.). After what time (tв) and at what distance from city A (хв) will the cars meet? How does the distance between them change if each car stops after traveling 120 km? Solve the problem analytically and graphically.

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