The distance between A and B is 632.5 kilometers. A passenger car and a truck depart from A and B at the same time and meet each other 5.5 hours later. It is known that the passenger car travels an average of 65 kilometers per hour, how many kilometers per hour does the truck travel on average?
甲、乙两地相距632.5千米，客车与货车同时从甲、乙两地相对开出，5.5小时后相遇．已知客车平均每小时行65千米，货车平均每小时行多少千米？
<gadget id="calculator">632.5 / 5.5</gadget>
<output>115</output>

<gadget id="calculator">115 - 65</gadget>
<output>50</output>

<result>50</result>