Two trains A and B are seen from two places 300 kilometers apart at the same time. After 2 hours, they have not met and are still 20 kilometers apart. It is known that train A travels 75 kilometers per hour. How many kilometers per hour does train B travel?
甲乙两列火车同时从相距300千米的两地相对看出，2小时后没有相遇还相距20千米，已知甲车每小时行75千米，乙车每小时行多少千米？
<gadget id="calculator">300 - 20</gadget>
<output>280</output>

<gadget id="calculator">280 / 2</gadget>
<output>140</output>

<gadget id="calculator">140 - 75</gadget>
<output>65</output>

<result>65</result>