Question
The speed of a train is 54 km/hr and it takes 10 seconds
to cross a man. Find the time taken by train to cross a platform if the ratio of the length of the platform to the train length is 11:5.Solution
Let the length of train be x m. According to the question, => 54 x (5/18) = x/10 => x = 150 m Length of the platform = 150 x (11/5) = 330 m Required time = (150 + 330)/15 = 32 seconds
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