A train of passenger cars and a train of trucks depart from places A and B at the same time, which are 324 kilometers apart, and meet each other after 2.4 hours. It is known that the passenger car travels 70 kilometers per hour, how many kilometers per hour does the truck travel? (Solve by two methods of arithmetic and equation)
一列客车与一列货车从相距324千米的甲、乙两地同时相对开出，2.4小时后相遇，已知客车每小时行70千米，货车每小时行多少千米？(用算术法与方程两种方法解答)
<gadget id="calculator">70 * 2.4</gadget>
<output>168</output>

<gadget id="calculator">324 - 168</gadget>
<output>156</output>

<gadget id="calculator">156 / 2.4</gadget>
<output>65</output>

<result>65</result>