The distance between A and B is 460 kilometers. A passenger train and a freight train meet each other 4 hours after driving opposite each other from the two places at the same time. The passenger car travels 60 kilometers per hour, how many kilometers per hour does the truck travel?
甲、乙两地相距460千米，一列客车和一列货车同时从两地相对开出4小时后相遇．客车每小时行60千米，货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>