Trains, boats and streams.
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Q1 · Time & Distance · EASY
A train 150 metres long passes a pole in 15 seconds. What is the speed of the train in km/hr?
Q2 · Time & Distance · MEDIUM
A boat travels 24 km downstream in 3 hours and returns upstream in 6 hours. What is the speed of the stream in km/hr?
Q3 · Time & Distance · MEDIUM
Two trains 200 metres and 150 metres long are running in opposite directions at speeds of 54 km/hr and 36 km/hr respectively. In how many seconds will they completely cross each other?
Q4 · Time & Distance · HARD
A man can row 12 km/hr in still water. If the speed of the stream is 3 km/hr, he takes 3 hours more to go upstream than to go downstream for the same distance. What is the distance travelled?
Q5 · Time & Distance · EASY
A train travels 180 km at a uniform speed. If the speed had been 9 km/hr more, it would have taken 1 hour less. What is the original speed of the train?