The distance between A and B is 720 meters. Two passenger and freight vehicles depart from A and B at the same time, drive towards each other, and meet each other in 5 hours. It is known that the passenger vehicle travels 90 kilometers per hour, how many kilometers per hour does the truck travel?
甲乙两地相距720米，客货两车分别从甲乙两地同时出发，相向而行，5小时相遇，已知客车每小时行90千米，货车每小时行多少千米？
<gadget id="calculator">720 / 5</gadget>
<output>144</output>

<gadget id="calculator">144 - 90</gadget>
<output>54</output>

<result>54</result>