The distance between A and B is 2250 kilometers. A bus and a truck leave from A and B at the same time and drive toward each other. The truck travels 70 kilometers per hour, and the speed of the passenger car is twice as fast as that of the truck, which is 40 kilometers more. , after how many hours does the passenger car and the truck meet?
甲乙两地相距2250千米，一辆汽客车和一辆货车分别从甲乙两地同时开出，相向而行，货车每小时行70千米，客车的速度是货车的2倍还多40千米，客车和货车经过几小时相遇？
<gadget id="calculator">70 * 2</gadget>
<output>140</output>

<gadget id="calculator">140 + 40</gadget>
<output>180</output>

<gadget id="calculator">70 + 180</gadget>
<output>250</output>

<gadget id="calculator">2_250 / 250</gadget>
<output>9</output>

<result>9</result>