The distance between the two cities is 675 kilometers. Two passenger cars A and B depart from the two cities at the same time and meet each other after 7.5 hours. It is known that car A travels 42 kilometers per hour, how many kilometers per hour does car B travel?
两城市相距675千米，甲、乙两客车分别从两城市同时相对开出，经过7.5小时相遇．已知甲车每小时行驶42千米，求乙车每小时行驶多少千米？
<gadget id="calculator">42 * 7.5</gadget>
<output>315</output>

<gadget id="calculator">675 - 315</gadget>
<output>360</output>

<gadget id="calculator">360 / 7.5</gadget>
<output>48</output>

<result>48</result>