Question
If a train takes 24 seconds to cross a pole and 36
seconds to cross a 180 metres long bridge, what is the speed of the train?Solution
Let the length of the train be ‘L’ metres. ATQ, 
Or, 36L = 24L + 4320 Or, 12L = 4320 Or, L = 360 metres Therefore, the length of the train is 360 metres. The speed of the train = 360/24 = 15 m/s
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