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地板

楼主 |
发表于 2012-5-26 22:20:36
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从og上找的一道有关constant speed的题,看来constant speed应该是指一个恒速,至于是全程恒速还是前20miles恒速就要看题目了,继续求大牛指导~~ Car A is 20 miles behind Car B, which is traveling in the same direction along the same route as Car A. Car A is traveling at a constant speed of 58 miles per hour and Car B is traveling at a constant speed of 50 miles per hour. How many hours will it take for Car A to overtake and drive 8 miles ahead of Car B ? |
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