Two cars drove oppositely from two places 135 kilometers apart at the same time, and the two cars met after 1.5 hours. The speed of one car is 48 kilometers per hour, find the speed of the other car.
两辆汽车同时从相距135千米的两地相对开出，1.5小时后两车相遇．一辆汽车的速度是每小时48千米，求另一辆汽车的速度．
<gadget id="calculator">48 * 1.5</gadget>
<output>72</output>

<gadget id="calculator">135 - 72</gadget>
<output>63</output>

<gadget id="calculator">63 / 1.5</gadget>
<output>42</output>

<result>42</result>