Started 4:45AM and reached 6:30PM.. Maintained cruise of 140 almost all the way.. Super awesome roads.. Felt like driving in US..Bangalore to Nagpur, Over 1000k. For me it’s a little tough one and pushing it. I really can’t do it since I don’t drive after dark. It’s over 18-19 hours for that distance which I have done once. Udaipur to Chandigarh and I did feel a bit stretched. I also once did Pune to Bangalore but it was quite nice.
My rule of thumb is about an average of 55kmph for the distance including all food and photo stops. Door to door.
But many people I know have done the 19 hour drives.