TNPSC Group II · Aptitude and Mental Ability
Trains, boats, relative speed and average speed.
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Q1 · Time, Speed and 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, Speed and Distance · MEDIUM
A boat travels 24 km upstream in 4 hours and returns downstream in 3 hours. What is the speed of the stream in km/hr?
Q3 · Time, Speed and Distance · MEDIUM
Two trains of lengths 120 metres and 180 metres 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?
Q4 · Time, Speed and Distance · EASY
A man covers a certain distance at 40 km/hr and returns to the starting point at 60 km/hr. What is his average speed for the entire journey?
Q5 · Time, Speed and Distance · MEDIUM
A train traveling at 90 km/hr crosses a platform of length 200 metres in 20 seconds. What is the length of the train?