The distance between A and B is 480km. The passenger car and the truck leave from the two places at the same time. It is known that the passenger car travels 65km per hour and the truck travels 55km per hour. After how many hours do the two vehicles meet?
甲、乙两地相距480km，客车和货车同时从两地相对开出，已知客车每小时行驶65km，货车每小时行驶55km，经过几小时两车相遇？
<gadget id="calculator">65 + 55</gadget>
<output>120</output>

<gadget id="calculator">480 / 120</gadget>
<output>4</output>

<result>4</result>