The distance between the two cities is 380 kilometers. A passenger train and a freight train depart from the two cities opposite each other. After 4 hours, the two trains meet. Given that the speed ratio of passenger cars and trucks is 11:8, find the speed of passenger cars.
两个城市相距380千米，一列客车和一列货车从两个城市相对开出，经过4小时后两车相遇．已知客车和货车的速度比是11：8，求客车的速度．
<gadget id="calculator">380 / 4</gadget>
<output>95</output>

<gadget id="calculator">11 + 8</gadget>
<output>19</output>

<gadget id="calculator">11 / 19</gadget>
<output>11/19 = around 0.578947</output>

<gadget id="calculator">95 * (11/19)</gadget>
<output>55</output>

<result>55</result>