A train 250 m long running at 72 kmph crosses a platform in 40 sec. What is the length of the platform?\nOptions:\n(A) 450m\n(B) 200m\n(C) 250m\n(D) 270m\n(E) 300 m Hmmm, my stream of consciousness:
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D = 72 * 5/18 = 40 = 800 â€“ 250 = 450m So, the answer is (A).
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