Two trains are moving at 80 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?\nOptions:\n(A) 6 sec\n(B) 7 sec\n(C) 7 2/2 sec\n(D) 8 sec\n(E) 9 sec OK. Let's think. Some random thoughts first:
User
70 + 80 = 150 * 5/18 = 125/3 mps\nD = 150 + 100 = 250 m\nT = 250 * 3/125 = 6 sec The answer: (A).
Assistant