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两个城市相距300千米,一辆汽车从一座城市驶向另一座城市,去时用了6小时,返回时少用2小时。(1)去的时候这辆汽车的速度是多少?(2)返回时的速度是多少?(3)这辆汽车往返的平均速度是多少?咔吱兔说:“这是一道基本的行程问题,主要抓住数量关系式:速度×时间=路程以及它的其他变形就行。”
The two cities are 300 kilometers apart. A car traveling from city to city takes 6 hours and returns less than 2 hours. (1) What is the speed of the car at the time of departure? (2) What is the speed of return? (3) What is the average speed of the car? The problem, the main seize the number of relations: speed × time = distance and other deformation on the line. “”