Two trains, fast and slow, depart from Station A and Station B at the same time, and run opposite each other. After 2.5 hours, they meet and pass 25 kilometers past the midpoint. It is known that the slow train travels 40 kilometers per hour. How much does the express train travel per hour? km?
快、慢两列火车分别从甲、乙两站同时开出，相对而行，经过2.5小时相遇，相遇时超过中点25千米，已知慢车每小时行驶40千米，快车每小时行多少千米？
<gadget id="calculator">40 * 2.5</gadget>
<output>100</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">100 + 50</gadget>
<output>150</output>

<gadget id="calculator">150 / 2.5</gadget>
<output>60</output>

<result>60</result>