数学题:当甲车到达时,乙车距离工地还有24千米
- 时间:2020-05-12 13:38:15
- 分类:数学世界
- 阅读:110 次
数学题:两辆汽车同时从某地出发,运送一批货物到距离165千米的工地,甲车比乙车早到48分钟,当甲车到达时,乙车距离工地还有24千米。甲车行完全程用了多少小时?
数学题解答:
先化单位,48分钟=0.8小时
“甲车比乙车早到48分钟,当甲车到达时,乙车距离工地还有24千米”说明乙车行完剩下的24千米路程需要48分钟,即0.8小时。
乙车的速度:24÷0.8=30(千米/小时)
乙车用的时间:165÷30=5.5(小时)
甲车用的时间:5.5 – 0.8 = 4.7(千米)
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