A passenger car and a truck depart from two places 585 kilometers apart at the same time. The passenger car travels 79.5 kilometers per hour. After 4.5 hours, the two vehicles meet. How many kilometers per hour does the truck travel?
客车和货车同时从相距585千米的两地相对开出，客车每小时行79.5千米，经过4.5小时两车相遇，货车每小时行多少千米？
<gadget id="calculator">585 / 4.5</gadget>
<output>130</output>

<gadget id="calculator">130 - 79.5</gadget>
<output>50.5</output>

<result>50.5</result>