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按照规定,我国载货车辆的轮胎对地面的压强应控制在7×105Pa以内,某型号货车部分参数如下表所示,王师傅在执行一次运输任务时,开着装满沙子的货车在一段平直的公路上匀速行驶15km。请解答该货车在本次运输过程中的下列问题:(g取10N/kg,沙子的密度为2.4×103kg/m3,燃油的热值为4.5×107J/kg)

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