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问题 解答题

一段高速公路长486千米，一辆客车4.5小时可行完全程，一辆货车5.4小时可行完全程，货车的速度比客车的速度慢多少？

答案

486÷4.5-486÷5.4

=108-90，

=18（千米）；

答：货车的速度比客车的速度慢18千米．

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