The speed of the passenger car is 70 km/h, and the speed of the truck is 55 km/h. The two cars depart from places A and B 400 kilometers apart at the same time. How many hours later will they meet?
客车速度为70千米/时，货车速度为55千米/时，两车从相距400千米的甲乙两地同时出发，多少小时后相遇？
<gadget id="calculator">70 + 55</gadget>
<output>125</output>

<gadget id="calculator">400 / 125</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>