The difference between speed of a super-fast train and a passenger train is 5 km/hr. Both the train travel to a destination 360 km away with a uniform speed. From the quadratic equation representing the speed of the trains if passenger train takes 1 hour more than the super-fast train to reach destination if they start at the same time.
Refer the following link for the answer similar to your query :
https://www.meritnation.com/ask-answer/question/an-express-train-takes-1-hour-less-than-a-passenger-train-to/quadratic-equations/1925117
https://www.meritnation.com/ask-answer/question/an-express-train-takes-1-hour-less-than-a-passenger-train-to/quadratic-equations/1925117