Two cars drive from two places 485 kilometers apart at the same time. After 4.5 hours, the distance is still 35 kilometers. Car A travels 48 kilometers per hour. How many kilometers per hour does car B travel?
两辆汽车同时从相距485千米的两地相对开出，经过4.5小时后，还相距35千米，甲车每小时行48千米，乙车每小时行多少千米？
<gadget id="calculator">485 - 35</gadget>
<output>450</output>

<gadget id="calculator">450 / 4.5</gadget>
<output>100</output>

<gadget id="calculator">100 - 48</gadget>
<output>52</output>

<result>52</result>