Two trucks A and B leave at the same time from two places that are 510 kilometers apart. After 5 hours, the distance is still 10 kilometers. It is known that truck B travels 46 kilometers per hour. How many kilometers per hour does vehicle A travel?
甲、乙两辆货车同时从相距510千米的两地相对开出，5小时后还相距10千米，已知乙车每小时行46千米，甲车每小时行多少千米？
<gadget id="calculator">510 - 10</gadget>
<output>500</output>

<gadget id="calculator">500 / 5</gadget>
<output>100</output>

<gadget id="calculator">100 - 46</gadget>
<output>54</output>

<result>54</result>