The distance between A and B is 500 kilometers. A car and a truck drive from A and B at the same time. After 3 hours, the distance between the two cars is 5 kilometers and they do not meet each other. The car travels 90 kilometers per hour. How many kilometers does the bus travel per hour?
甲、乙两城相距500千米，一辆小汽车和一辆货车同时从甲、乙两城相向开出，3小时后两车相距5千米没相遇，小汽车每小时行90千米，客车每小时行多少千米？
<gadget id="calculator">500 - 5</gadget>
<output>495</output>

<gadget id="calculator">495 / 3</gadget>
<output>165</output>

<gadget id="calculator">165 - 90</gadget>
<output>75</output>

<result>75</result>