On a map with a scale of 1:8000000, it is measured that the distance between A and B is 15.5cm. Two trains depart from A and B at the same time and meet each other in 4 hours. It is known that one of the trains travels 150 km per hour, how many kilometers per hour does the other train travel?
在比例尺是1：8000000的地图上，测得甲、乙两地相距15.5cm，两列火车分别从甲、乙两地同时出发，4小时相遇．已知其中一列火车每小时行驶150km，另一列火车每小时行驶多少千米？
<gadget id="calculator">1 / 8_000_000</gadget>
<output>1/8_000_000 = around 0</output>

<gadget id="calculator">15.5 / (1/8_000_000) / 100_000 / 4</gadget>
<output>310</output>

<gadget id="calculator">310 - 150</gadget>
<output>160</output>

<result>160</result>