Two trains are moving at 75 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 6/29 sec\n(B) 7 1/7 sec\n(C) 7 2/2 sec\n(D) 8 1/2 sec\n(E) 7 1/19 sec Now, let's think a bit. Some random thoughts:
User
70 + 75 = 145 * 5/18 = 725/18 mps\nD = 150 + 100 = 250 m\nT = 250 * 18/725 = 180/29 = 6 6/29 sec
The final answer: (A).
Assistant