The passenger car and the freight car are traveling towards each other from places A and B at the same time, and return immediately after arriving at the opposite station. When they meet for the second time, the distance between the freight car and point A is 36 kilometers, and the speed ratio of the passenger car to the freight car is 4:3. How many kilometers are there between A and B?
客车和货车分别从甲、乙两地同时相向而行，到达对方车站后立即返回，第二次相遇时货车距甲地36千米，客车速度与货车速度比为4：3．甲、乙两地相距多少千米？
<result>50.5</result>