Two cars, A and B, drive from city A to city B at the same time. Car A travels 60 kilometers per hour, and car B travels 45 kilometers per hour. After 5 hours of departure, car A encounters an oncoming passenger car. After 50 minutes, car B also encountered this car. How many kilometers per hour does the car travel.
甲、乙两辆汽车同时从A城开往B城，甲车每小时行60千米，乙车每小时行45千米，出发5小时，甲车遇到迎面开来的一辆客车，再过50分钟，乙车也遇到这辆汽车．这辆客车每小时行多少千米．
<gadget id="calculator">60 - 45</gadget>
<output>15</output>

<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">45 * (5/6)</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">75 - (75/2)</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">(75/2) / (5/6)</gadget>
<output>45</output>

<result>45</result>