passenger car and a truck depart from A at the same time and drive to B along the same road. The bus arrives at B after 3 hours, and the truck is still 90 kilometers away from B. Given that the speed of the truck is 80 km/h, find the speed of the passenger car.
一辆客车和一辆货车同时从甲地出发，沿同一条公路开往乙地，3小时后客车到达乙地，货车距乙地还有90千米．已知货车的速度是每小时80千米，求客车的速度．
<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 + 90</gadget>
<output>330</output>

<gadget id="calculator">330 / 3</gadget>
<output>110</output>

<result>110</result>