There are two trains A and B. A train is 260 meters long and travels 22 meters per second; B train is 240 meters long. The two trains are traveling in the same direction. It took 125 seconds for A to overtake B. arrive at the rear of car A and leave the front of car B), how many meters does car B travel per second?
有甲，乙两列火车，甲车长260米，每秒行22米；乙车长240米，两列火车同向行驶，甲车超过乙车共用了125秒(从甲车追上乙车的到甲车车尾离开乙车车头)，问乙车每秒行多少米？
<gadget id="calculator">260 + 240</gadget>
<output>500</output>

<gadget id="calculator">500 / 125</gadget>
<output>4</output>

<gadget id="calculator">24 - 4</gadget>
<output>20</output>

<result>20</result>