A train is moving at the speed of 72 km/hr. How many seconds will it take to cover a distance of 1400 m ?
Speed of train = 72 km/hr = $$(72\times\frac{5}{18})=20$$ m/s
Time taken to cover 1400 m = distance/speed
= $$\frac{1400}{20}=70$$ seconds
=> Ans - (A)
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