Give stream of consciousness and then the final answer. Two trains are moving at 60 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) 5 sec\n(B) 6 sec\n(C) 7 sec\n(D) 8 sec\n(E) 9 sec
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70 + 60 = 130 * 5/18 = 325/9 mps\nD = 150 + 100 = 250 m\nT = 250 * 9/325 = 7 se
The final answer: (C).
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