and B start from A and B respectively at the same time and walk towards each other. When they start, their speed ratio is 3:2. After they meet for the first time, A’s speed increases by 20%, and B’s speed increases by 30% %, in this way, when A arrives at B, B is still 7 kilometers away from A, so how many kilometers is the distance between A and B?
甲、乙两人分别从A、B两地同时出发，相向而行，出发时他们的速度比是3：2，他们第一次相遇后，甲的速度提高20%，乙的速度提高了30%，这样，当甲到达B地时，乙离A还有7千米，那么A、B两地的距离是多少千米？
<result>22.5</result>