Trains, boats, average speed and relative speed.
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Q1 · Time and Distance · EASY
A train 120 metres long passes a platform 180 metres long in 15 seconds. What is the speed of the train in km/hr?
Q2 · Time and Distance · MEDIUM
A man can row 30 km downstream in 3 hours and the same distance upstream in 5 hours. What is the speed of the stream in km/hr?
Q3 · Time and Distance · MEDIUM
Two trains of length 150 metres and 200 metres are running in opposite directions at speeds of 54 km/hr and 72 km/hr respectively. In how many seconds will they cross each other?
Q4 · Time and Distance · MEDIUM
A car covers a certain distance at 60 km/hr and returns back at 40 km/hr. What is the average speed for the whole journey in km/hr?
Q5 · Time and Distance · HARD
A train starts from station A at 8:00 AM and reaches station B at 12:00 noon. Another train starts from station B at 9:00 AM and reaches station A at 12:30 PM. At what time do the two trains cross each other, assuming they travel on parallel tracks?