Indian Epics Reality

Hi friends my name is Kartik and I am going to share you the reality of long written Epics such as Ramayana ,Mahabharta and Bhagwat Gita.Actually I came to know about Ramayana story in which Ram killed Ravana which is the day known as Dussehra.Then they all went back to Ahyodya from Sri Lanka.
Now comes the scientific result of it,if we search on internet ,distance between Ahyodya and Sri Lanka it shows somewhat distance 3145.5 km.This distance is travelled by Sri Ram by foot and took about 21 days and on Google Maps it shows 494 hours which turn out to be 20 .5 days 12 hours here and there.The 21st day is celebrated as Diwali festival as lord Ram arrived to there own kingdom after 13 years of Vanvas and killing Ravana in Sri lanka.So civilians from Ahyodya celebrated that day by lighting up the whole kingdom.From that time Diwali is celebrated every year after 20 days of Dussehra.This is the whole story I think is somewhat connected to reality but again some question comes in mind about how they continuosly walk for 20 days? If you think about same or with another conception then comment that we would rather discussed about it.
Thanks guys for your precious time.
Peace!