A passenger car and a truck depart from two cities that are 300 kilometers apart at the same time. After 2.5 hours, the two cars meet on the way. The bus travels 65 kilometers per hour. How many kilometers per hour does the truck travel?
客车和货车同时从相距300千米的两城相对开出，经过2.5小时后两车在途中相遇，客车每小时行65千米，货车每小时行多少千米？
<gadget id="calculator">300 / 2.5</gadget>
<output>120</output>

<gadget id="calculator">120 - 65</gadget>
<output>55</output>

<result>55</result>