A person is standing on a railway bridge which is 200m long.
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A person is standing on a railway bridge which is 200m long. He observes that a train crosses the bridge in 30 seconds but it crosses him in 10 seconds. Find the length of train and its speed.
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Answer: C. C) 300m, 30m/s
The correct option is C: '300m, 30m/s'.