Student: A train of 24 carriages, each of 60 meters length, when an engine also of 60 meters length is running at a speed of 60 kmph. In what time will the train cross a bridge 1.5 km long?\nOptions:\n(A) 5 mins\n(B) 3 mins\n(C) 7 mins\n(D) 9 mins\n(E) 2 mins.
Another student: Let's say, hmmm...

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D = 25 * 60 + 1500 = 3000 m\nT = 3000/60 * 18/5 = 180 sec = 3 mins Final answer: (B).
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