TN Police PC · Mathematics & Numerical Ability
Trains, boats and streams.
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Q1 · Time & Distance · EASY
A train 150 metres long passes a pole in 10 seconds. What is the speed of the train in km/h?
Q2 · Time & Distance · MEDIUM
A boat covers 24 km upstream in 4 hours and 24 km downstream in 3 hours. What is the speed of the stream?
Q3 · Time & Distance · MEDIUM
Two trains of length 120 metres and 180 metres are running in opposite directions at speeds of 54 km/h and 36 km/h respectively. In how many seconds will they cross each other?
Q4 · Time & Distance · HARD
A man can row 10 km/h in still water. If the speed of the stream is 2 km/h, how long will he take to row 36 km upstream and 36 km downstream?
Q5 · Time & Distance · HARD
A train 200 m long is running at a speed of 72 km/hr. How long will it take to cross a platform 300 m long?