A train of 150m in length is going towards the north direction at a speed of 10m/s. A parrot flying at the speed of 5m/s towards the south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to 10 seconds.
Time taken to cross the train = Length/Relative Velocity
Time taken = 150/(10+5) = 150/15 = 10
Hence, the time taken by the parrot to cross the train is 10 seconds.