1. If the train takes the route: JBP- ET- NGP- DURG- R, distance traveled = 845 km
2. if it takes the route: JBP- KTE-BSP- R- DURG- NGP, distance traveled = 822 km
I will say that route 2 is shorter plus it connects areas of MP and Chattisgarh with NGP. Hence recommended. Also distance between JBP- R is only 557 km