The passenger car and the truck are traveling towards each other at the same time. After 3 hours, the truck travels 60 kilometers longer than the passenger car. It is known that the speed ratio of the passenger car and the truck is 5:7. How many kilometers does the passenger car travel per hour?
客车货车分别从甲乙两地同时相向而行，经过3小时相遇，相遇时货车比客车多行60千米，已知客车与货车的速度比时5：7，客车每小时行多少千米？
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(7/12) - (5/12)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">60 / (1/6)</gadget>
<output>360</output>

<gadget id="calculator">(5/12) / 3</gadget>
<output>5/36 = around 0.138889</output>

<gadget id="calculator">360 * (5/36)</gadget>
<output>50</output>

<result>50</result>