Two cars drive from two places 250 kilometers apart at the same time. After 2.5 hours, the distance is still 25 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250千米的两地相对开出，经过2.5小时后，还相距25千米，甲车每小时行48千米，乙车每小时行多少千米？
<gadget id="calculator">250 - 25</gadget>
<output>225</output>

<gadget id="calculator">225 / 2.5</gadget>
<output>90</output>

<gadget id="calculator">90 - 48</gadget>
<output>42</output>

<result>42</result>