The distance between A and B is 450 kilometers. A bus and a truck drive from the two places at the same time and meet each other for 5 hours. It is known that the bus travels 48 kilometers per hour. How many kilometers does the truck travel per hour?
甲乙两地相距450千米，客车和货车同时从两地相对开出5小时相遇，已知客车每小时行48千米，货车每小时行多少千米？
<gadget id="calculator">450 / 5</gadget>
<output>90</output>

<gadget id="calculator">90 - 48</gadget>
<output>42</output>

<result>42</result>