Give a quick stream of consciousness before answering the following question. A train 500 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) 28\n(C) 49\n(D) 64\n(E) 21
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S = (500 + 300)/45 = 800/45 * 18/5 = 64
The answer: (D).
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