Ravi is riding his bike with a speed 80 km/hr on the road which is along to a railway track on which Rajdhani Express having length 250 meters is running with a speed of 90 km/hr. Suddenly Ravi saw that there is sparking in train’s generator coach which is just on the right side of Ravi. At which speed Ravi ride his bike so that he inform driver of the train at 54th second.