A train is moving at the speed of 54 km/hr. How many seconds it will take to cover a distance of 450 metres?
Speed of train = 54 km/hr = $$(54\times\frac{5}{18})=15$$ m/s
Let time taken to cover 450 m = $$t$$ seconds
Using, time = distance/speed
=> $$t=\frac{450}{15}=30$$ seconds
=> Ans - (B)
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