Two cars travel from city A to city B at a speed of 30 and 44 km/hr respectively. If one car takes 3.5 hours lesser time than the other car for the journey, then the distance between City A and City B is A train , 500 mt long, running at a uniform speed passes a station in 35 seconds. If the length of the platform is 221 mt , the speed of the train in km/hr is?