A truck transports goods from town A to town B. When it goes there, it is full of goods and travels an average of 55 kilometers per hour. It takes a total of 2.4 hours to travel. When it returns, it takes 2 hours to arrive at town A when it is empty. When it returns, it travels an average of 1,000 kilometers per hour. rice?
一货车从A镇运货到B镇，去的时候满载货物，平均每小时行驶55千米，一共行驶2.4小时，返回时空车行驶了2小时就到达A镇，返回时平均每小时行驶多少千米？
<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<gadget id="calculator">55 * 1.2</gadget>
<output>66</output>

<result>66</result>