The distance between A and B is 272km. Two cars drive towards each other at the same time and meet each other in 3.2 hours. Car A travels 45 km per hour, how many kilometers per hour does Car B travel?
甲、乙两地相距272km，两辆汽车同时从两地相向开出，3.2小时相遇．甲车每小时行45km，乙车每小时行多少千米？
<gadget id="calculator">272 / 3.2</gadget>
<output>85</output>

<gadget id="calculator">85 - 45</gadget>
<output>40</output>

<result>40</result>