Both cars A and B travel from A to B. Car A starts 30 minutes earlier than car B, and when it reaches one-third of the journey, car A breaks down. It takes 15 minutes to repair the car, and it ends up arriving at B 15 minutes later than car B. The speed of car A remains unchanged before and after repairing, and the whole journey is 300 kilometers. Then how many kilometers away from A is the car B when it catches up with A car?
甲、乙两车都从A地到B地．甲车比乙车提前30分钟出发，行到全程三分之一时，甲车发生了故障，修车花了15分钟，结果比乙车晚到B地15分钟．甲车修车前后速度不变，全程为300千米．那么乙车追上甲车时在距A地多少千米．
<gadget id="calculator">300 / 2</gadget>
<output>150</output>

<result>150</result>