A relgadi ki lambai 250mitar hai jo relgagadi 60kmki gati se chal rahi hai a khambhe ko par karne me kitna time lgege
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speed of the train= 60km per hr = 60×1000m/(60×60) sec = 100/6 metre per second
The train goes 100/6 m in 1 s
It will take 250×6/100 s = 15 second to pass the khambha
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