Cars A and B start at the same time from places A and B, which are 240 kilometers apart, and drive toward each other, and meet after (5/3) hours. Car A travels an average of 72 kilometers per hour, how many kilometers per hour does Car B travel on average?
甲乙两车从相距240千米的A、B两地同时出发相向而行，经过(5/3)小时相遇．甲车平均每小时行72千米，乙车平均每小时行多少千米？
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">240 / (5/3)</gadget>
<output>144</output>

<gadget id="calculator">144 - 72</gadget>
<output>72</output>

<result>72</result>