摘要：梅林中学租用两辆小汽车同时送1名带队老师及7名九年级的学生到县城参加数学竞赛.每辆限坐4人．其中一辆小汽车在距离考场15km的地方出现故障.此时离截止进考场的时刻还有42分钟.这时唯一可利用的交通工具是另一辆小汽车.且这辆车的平均速度是60km/h.人步行的速度是5km/h． (1)若小汽车送4人到达考场.然后再回到出故障处接其他人.请你能过计算说明他们能否在截止进考场的时刻前到达考场, (2)假如你是带队的老师.请你设计一种运送方案.使他们能在截止进考场的时刻前到达考场.并通过计算说明方案的可行性． 解:(1).. 不能在限定时间内到达考场．············································································· 4分 (2)方案1:先将4人用车送到考场.另外4人同时步行前往考场.汽车到考场后返回到与另外4人的相遇处再载他们到考场．···················································································································· 5分 先将4人用车送到考场所需时间为．

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