Cars A and B drive oppositely from two places 460 kilometers apart at the same time. Car A travels 60 kilometers per hour. After 4 hours, the two cars meet. How many kilometers does car B travel per hour?
甲乙两车从相距460千米的两地同时相对开出，甲车每小时行60千米，4小时后两车相遇．乙车每小时行多少千米？
<gadget id="calculator">460 / 4</gadget>
<output>115</output>

<gadget id="calculator">115 - 60</gadget>
<output>55</output>

<result>55</result>