After the sixth major speed increase of the railway, the EMU can travel 515 kilometers within 2 hours, so how many kilometers does the EMU travel on average (expressed in fractions) per hour
铁路进行第六次大提速后，动车组可以在2小时内行驶515千米，那么动车组平均每小时行驶(用分数表示)多少千米
<gadget id="calculator">515 / 2</gadget>
<output>515/2 = around 257.5</output>

<result>515/2 = around 257.5</result>