A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 19 seconds. What is the length of the platform in meters?\nOptions:\n(A) 220 meters\n(B) 360 meters\n(C) 420 meters\n(D) 600 meters\n(E) Cannot be determined Hmmm, my stream of consciousness:
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Speed of the train in metres/sec = 72000/3600 = 20\nDistance travelled by train to cross the platform = 30 * 20 = 600 = Length of train + Length of platform\nDistance travelled by train to cross the man = 19 * 20 = 380 = Length of train\nLength of platform = 600 - 380 = 220 So, the answer is (A).
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