小明乘坐火车从某地到上海去参观世博园,已知此次行程为2160千米

小明乘坐火车从某地到上海去参观世博园,已知此次行程为2160千米,城际直达动车组的平均时速是特快列车的.小明购买火车票时发现,乘坐动车组比乘坐特快列车少用6小时.求小明乘坐动车组到上海需要的时间.

答案

解:设小明乘坐动车组到上海需要小时

    依题意,得.

解得 .

经检验:是方程的解,且满足实际意义.

答:小明乘坐动车组到上海需要小时

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