1. A 800 metres long train is running at the speed of 90 km/hr. If it crosses a bridge in 50 seconds, then what is the length (in metres) of the bridge?
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By: anil on 05 May 2019 02.06 am
Let length of bridge = $$l$$ m and length of train = 800 m Speed of train = 90 km/hr = $$(90 imesfrac{5}{18})=25$$ m/s Using, distance = speedĀ $$ imes$$ time => $$l+800=25 imes50$$ => $$l=1250-800=450$$ m => Ans - (D)
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