它们将于几时几分在途中再次相遇
- 时间:2020-05-20 15:28:23
- 分类:数学世界
- 阅读:137 次
数学题:南京中央门汽车站与无锡汽车站之间的公路长约180千米。早上7:00甲、乙两辆长途汽车从两站同时出发相对开出,甲汽车平均每小时行80千米,乙汽车平均每小时行70千米。假设两辆汽车分别到达目的地后,各有半小时上下客时间,然后立即返回,它们将于几时几分在途中再次相遇?
数学题解答:两车同时出发相向而行,相遇后继续前行,然后回头再相遇,那么两车一共行了三个全程。它们行驶所用的时间是:
180×3÷(80+70)=3又3/5(小时)
再加上它们所用的半小时上下客的时间,一共用时:
3又3/5 + 1/2 = 4又1/10(小时)=4小时6分
最后相遇的时间是:
7时+4小时6分=11时6分。
答:两车相遇的时间是11:06。
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