A 210 𝑚 long train is moving due North at a speed of 25 𝑚/𝑠. A small bird is flying due South a little above the train with speed 5 𝑚/𝑠. The time taken by the bird to cross the train is

Question : A 210 𝑚 long train is moving due North at a speed of 25 𝑚/𝑠. A small bird is flying due South a little above the train with speed 5 𝑚/𝑠. The time taken by the bird to cross the train is