A train 400 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?\nOptions:\n(A) 32\n(B) 56\n(C) 29\n(D) 27\n(E) 21 OK. Let's think. Some random thoughts first:
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S = (400 + 300)/45 = 700/45 * 18/5 = 56 The answer: (B).
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