A train is moving from station A to station B which are 350 km apart. 200 km ahead of station A, a passenger in the train pulls an emergency chain due to which train is delayed by 20 minutes. In order to reach the destination on time, the driver increases the speed of the train by 15km/h. What is the original time taken by the train to go from station A to B?
1
\(5\frac{2}{3}\) hours
2
\(6\frac{1}{3}\) hours
3
6 hours
4
\(4\frac{2}{3}\) hours
5
\(5\frac{1}{2}\) hours