HMMT 十一月 2013 · THM 赛 · 第 1 题

英文解析

1. [ 2 ] Two cars are driving directly towards each other such that one is twice as fast as the other. Thedistance between their starting points is 4 miles. When the two cars meet, how many miles is thefaster car from its starting point?
   Answer: Note that the faster car traveled twice the distance of the slower car, and together,8
   the two cars traveled the total distance between the starting points, which is 4 miles. Let the distance 3
   x 8 8
   that the faster car traveled be x . Then, x + = 4 = ⇒ x = . Thus, the faster car traveled miles
   2 3 3
   from the starting point.