passenger car and a truck start from A and B at the same time and go towards each other. When the bus travels 30% of the journey, the truck is 60 kilometers away from B; Land A is still 20 kilometers away. What is the distance between A and B in miles?
一辆客车与一辆货车分别从A、B两地同时出发相向而行，当客车行驶全程的30%时，货车距B地60千米；照这样行驶，当客车到达B地时，货车距A地还有20千米．则A、B两地相距多少千米．
<result>200</result>