Three vehicles A, B, and C start from A to B at the same time, and the speeds of A and B are 60 km/h and 48 km/h respectively. There is an oncoming truck that meets A, B, and C successively at 6 o'clock, 7 o'clock, and 8 o'clock after they set off. Find the speed of car C.
甲、乙、丙三辆车同时从A地出发到B地去，甲、乙两车的速度分别为60千米/时和48千米/时．有一辆迎面开来的卡车分别在他们出发后6时、7时、8时先后与甲、乙、丙三辆车相遇．求丙车的速度．
<gadget id="calculator">60 - 48</gadget>
<output>12</output>

<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">72 - 48</gadget>
<output>24</output>

<gadget id="calculator">7 - 6</gadget>
<output>1</output>

<gadget id="calculator">24 / 1</gadget>
<output>24</output>

<gadget id="calculator">60 + 24</gadget>
<output>84</output>

<gadget id="calculator">84 * 6</gadget>
<output>504</output>

<gadget id="calculator">24 * 8</gadget>
<output>192</output>

<gadget id="calculator">504 - 192</gadget>
<output>312</output>

<gadget id="calculator">312 / 8</gadget>
<output>39</output>

<result>39</result>