A truck and a passenger car travel towards each other at the same time from places A and B, which are 460.5 kilometers apart. After 4.5 hours, the distance between the two cars was 19.5 meters. It is known that the truck travels 48 kilometers per hour, how many kilometers per hour does the passenger car travel?
货车和客车分别从相距460.5千米的甲、乙两地同时相向而行．经过4.5小时两车相距19.5米．已知货车每小时行48千米，客车每小时行多少千米？
<gadget id="calculator">460.5 - 19.5</gadget>
<output>441</output>

<gadget id="calculator">441 / 4.5</gadget>
<output>98</output>

<gadget id="calculator">98 - 48</gadget>
<output>50</output>

<result>50</result>