To travel 816 km, an Express train takes 9 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 4 hours less than
Rajdhani. What is the speed of Rajdhani?
1). 48 km/hr
2). 62.8 km/hr
3). 33.2 km/hr
4). 77.5 km/hr