Two trains, A and B, depart from two cities 168 kilometers apart at the same time and meet each other in 1.5 hours. Train A travels an average of 58 kilometers per hour. How many kilometers per hour does train B travel on average? (Please use your favorite method to answer)
甲、乙两列火车分别从相距168千米的两城同时相向开出，1.5小时相遇，甲火车平均每小时行58千米，乙火车平均每小时行多少千米？(请用你喜欢的方法解答)
<gadget id="calculator">168 / 1.5</gadget>
<output>112</output>

<gadget id="calculator">112 - 58</gadget>
<output>54</output>

<result>54</result>