The distance between the two cities is 380 kilometers. A passenger train and a freight train depart from two cities at the same time and meet after 4 hours. It is known that the speed ratio of passenger cars and trucks is 11:8. How much more miles per hour does the passenger car travel than the truck?
两个城市相距380千米．一列客车和一列货车同时从两个城市相对开出，经过4小时后相遇．已知客车和货车速度的比是11：8．求客车每小时比货车每小时多走多少千米？
<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>

<gadget id="calculator">8 / 19</gadget>
<output>8/19 = around 0.421053</output>

<gadget id="calculator">95 * (8/19)</gadget>
<output>40</output>

<gadget id="calculator">55 - 40</gadget>
<output>15</output>

<result>15</result>