Two cars, A and B, drive respectively from cities A and B opposite each other. Car A travels 60 kilometers per hour. The two cars met 4 hours after they drove off, and the distance ratio between A and B when they met was 6:5. How many kilometers does car B travel per hour?
甲、乙两辆汽车分别从A、B两城相对开出，甲车每小时行60千米．两车开出后4小时相遇，相遇时甲、乙两车的路程比是6：5．乙车每小时行多少千米？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">60 * (5/6)</gadget>
<output>50</output>

<result>50</result>