1. A train crosses a platform in 50 seconds travelling with a speed of 72 km/hr. If the length of the train be 250 metres, then what will be the length (in metres) of the platform?





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  • By: anil on 05 May 2019 02.24 am
    Speed of train = 72 km/hr = $$(72 imesfrac{5}{18})$$ m/s = $$20$$ m/s Let length of platform = $$x$$ m and length of train = 250 m Using, time = distance/speed => $$frac{250+x}{20}=50$$ => $$250+x=50 imes20$$ => $$x=1000-250=750$$ m => Ans - (C)
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