The distance between A and B is 740 meters. Two trains leave opposite to each other at the same time. After 5 hours, they meet. A train travels 72 kilometers per hour. How many kilometers per hour does B train travel?
甲乙两地相距740米，两列火车同时从两地相对开出，经过5小时相遇，甲车每小时72千米，乙车每小时行多少千米？
<gadget id="calculator">740 / 5</gadget>
<output>148</output>

<gadget id="calculator">148 - 72</gadget>
<output>76</output>

<result>76</result>