The length of the railway between the two stations is 250 kilometers. A freight train and a passenger train leave oppositely from two stations at the same time and meet after 2.5 hours. The passenger car travels 52 kilometers per hour, how many kilometers per hour does the truck travel?
两站间的铁路长250千米．一列货车和一列客车同时从两站相对开出，2.5小时后相遇．客车每小时行52千米，货车每小时行多少千米？
<gadget id="calculator">250 / 2.5</gadget>
<output>100</output>

<gadget id="calculator">100 - 52</gadget>
<output>48</output>

<result>48</result>