A train of passenger trains and a train of freight trains travel at the same time, at the same place, and in opposite directions. The distance traveled by the passenger car per hour is 1.5 times that of the truck. After 5 hours, the distance between the two cars is 720 kilometers. How many kilometers does the truck travel per hour? (Solution of column equation)
一列客车和一列货车同时、同地、反向而行．客车每小时行的路程是货车的1.5倍，5小时后，两车相距720千米，求货车每小时行多少千米？(列方程解)
<gadget id="calculator">1.5 * 5</gadget>
<output>7.5</output>

<gadget id="calculator">5 + 7.5</gadget>
<output>12.5</output>

<gadget id="calculator">720 / 12.5</gadget>
<output>57.6</output>

<result>57.6</result>