Car A and car B drive oppositely from two places at the same time. Car A is faster than car B. After 5 hours, they meet at a distance of 30 kilometers from the midpoint. Car A travels 60 kilometers per hour, how many kilometers per hour does Car B travel?
甲乙两车从两地同时相对开出，甲车的速度比乙车快，5小时后在距离中点30千米处相遇．甲车每小时行60千米，乙车每小时行多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 * (2/5)</gadget>
<output>12</output>

<gadget id="calculator">60 - 12</gadget>
<output>48</output>

<result>48</result>