A 280 m long train is running at 108 km/hr. In how much time will it cross a bridge of length 170 m?
Speed of train = $$108\times\frac{5}{18}$$ m/s = $$30$$ m/s
Distance covered = $$280+170=450$$
$$\therefore$$ Time taken = $$\frac{450}{30}=15$$ seconds
=> Ans - (B)
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