Cars A and B start from two places 459 kilometers apart at the same time and drive toward each other, and meet each other in 4.5 hours. Car A travels 46.5 kilometers per hour, how many kilometers per hour does Car B travel?
甲、乙两车分别从相距459千米的两地同时出发相对而行，4.5小时相遇．甲车每小时行46.5千米，乙车每小时行多少千米．
<gadget id="calculator">459 / 4.5</gadget>
<output>102</output>

<gadget id="calculator">102 - 46.5</gadget>
<output>55.5</output>

<result>55.5</result>