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Q
How long will a train of length 400m travelling at a speed of 72 km/hr take to cross a platform of length 200m ?
Solution
Length of the train = 400 mLength of the platform = 200 mSpeed of the train = 72 km/hr = 72 × (5/18) = 20...
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Keynote
To convert speed in km/hr to m/sec multiply it with 5/18.
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