Yash is excited about his journey from Visakhapatnam to Chennai. This ride will be his first bus journey in a long time. The bus left from the stand from Visakhapatnam on 12th May at 11:20 at night. On 13th May, the bus arrived at the Chennai bus stand at 12:35 in the afternoon. If the distance between Visakhapatnam to Chennai is 848 km, what is the average speed the bus should maintain during the whole journey?