On a map with a scale of 1:3000000, the measured distance between A and B is 50 cm. If two trains A and B depart from A and B oppositely at the same time, and meet each other after 10 hours, passenger train A travels 76 kilometers per hour, how many kilometers per hour does passenger train B travel?
在比例尺是1：3000000的地图上，量的A、B两地的距离是50厘米．如果甲、乙两列客车同时从A、B两地相对开出，经过10小时相遇，甲客车每小时行76千米，乙客车每小时行多少千米？
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">50 / (1/3_000_000) / 100_000 / 10</gadget>
<output>150</output>

<gadget id="calculator">150 - 76</gadget>
<output>74</output>

<result>74</result>