A naughty bird is sitting on top of a train. It sees another train app

| A naughty bird is sitting on top of a train. It sees another train approaching it at a distance of 25 km. The speed of the two trains is 62.5 km/hr each. The bird starts flying from the first train and moves towards the second train, reaches the second train and comes back to the first train and so on. If the speed at which the bird flies is 114 km/hr. Find the total distance travelled by the bird? (Assume that the two trains have a crash)