The expert in anything was once a beginner.— Helen Hayes

Time and Distance

Trains, boats, average speed and relative speed.

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Q1 · Time and Distance · EASY
A train 150 metres long passes a telegraph post in 10 seconds. What is the speed of the train in km/hr?
Q2 · Time and Distance · MEDIUM
A boat can travel 30 km downstream in 2 hours and 20 km upstream in 4 hours. What is the speed of the boat in still water?
Q3 · Time and Distance · MEDIUM
A car travels from Delhi to Gurugram at a speed of 60 km/hr and returns at a speed of 40 km/hr. What is the average speed for the entire journey?
Q4 · Time and Distance · HARD
Two trains 120 metres and 180 metres long are running in opposite directions at speeds of 54 km/hr and 72 km/hr respectively. In how many seconds will they completely cross each other?
Q5 · Time and Distance · MEDIUM
A train 150 meters long crosses a platform of length 250 meters in 20 seconds. What is the speed of the train in km/hr?