The distance between A and B is 275km. Cars A and B respectively start from A and B at the same time and drive toward each other. Car A travels 45 kilometers per hour, and car B travels 65 kilometers per hour. After how many hours will the two cars meet?
A、B两地相距275km，甲乙两车分别从A、B两地同时出发，相向而行．甲车每小时行45千米，乙车每小时行65千米，多少小时后两车相遇？
<gadget id="calculator">65 + 45</gadget>
<output>110</output>

<gadget id="calculator">275 / 110</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>