Q: Two trains are traveling on parallel tracks in the same direction. The faster train travels at 120 miles per hour, while the slower train travels at 100 miles per hour. At 2 o’clock the faster train is 10 miles behind the slower one. How far apart are the two trains at 6 o'clock?\nOptions:\n(A) 60 miles\n(B) 80 miles\n(C) 110 miles\n(D) 120 miles\n(E) 400 miles Let's give some random thoughts before answering.
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Answer = C. 110 miles\nRelational speed = 120 - 100 = 20 miles per hour\nIn 4 hours, difference = 20 * 4 = 120 miles\nFast train trailing 10 miles, so effective difference = 120 - 10 = 110 miles
Therefore, the answer is (C).
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