A and B are traveling in the same direction at the same time from places A and B, which are 18 kilometers apart, with B in front and A behind. When A catches up with B and travels for 1.5 hours, B travels 48 kilometers per hour, find the speed of A.
甲、乙分别从相距18千米的A、B两地同时同向而行，乙在前甲在后．当甲追上乙时行了1.5小时，乙车每小时行48千米，求甲车速度．
<gadget id="calculator">48 * 1.5</gadget>
<output>72</output>

<gadget id="calculator">72 + 18</gadget>
<output>90</output>

<gadget id="calculator">90 / 1.5</gadget>
<output>60</output>

<result>60</result>