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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