1. 5 hrs after a goods train passed a station, another train travelling at a speed of 70 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 9 hours. What is the speed of the goods train?
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By: anil on 05 May 2019 02.10 am
Let the speed of goods train = $$x$$ km/hr Speed of another train = 70 km/hr Distance between the two trains = $$70 imes 5 = 350$$ km The trains are moving in same direction, => Relative speed = $$(70 - x)$$ km/hr Time = 5 + 9 = 14 hours => speed = distance/time => $$70 - x = frac{350}{14} = 25$$ => $$x = 70 - 25 = 45$$ km/hr => Ans - (A)
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