The railway from point A to point B is 499 kilometers long. A train travels from point A to point B at an average of 69 kilometers per hour. One hour after the train leaves, a passenger car departs from point B to point A. Two hours later, the two cars meet, how many kilometers per hour does the passenger car travel on average?
A地到B地的铁路长499千米，一列火车从A地开往B地，平均每小时行69千米，这列火车开出一小时后，一列客车从B地出发开往A地，又过两小时两车相遇，客车平均每小时行多少千米？
<gadget id="calculator">499 - 69</gadget>
<output>430</output>

<gadget id="calculator">430 / 2</gadget>
<output>215</output>

<gadget id="calculator">215 - 69</gadget>
<output>146</output>

<result>146</result>