Not sure , if you watched the Dhruv's Video first of all.
Dhruv's Video - It talks about 8 million people's visit generating 25 cr.
So , If we get same revenue 25 cr it will take 120 YEARS.
In second analysis , he takes 1 million people visiting statue of unity with Rs 350 tickets - 35 crs - 86 yrs.
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The second video , it is totally different .
They calculate - 8 million visiting Statue of Unity with Rs 150 tickets generating Rs 120 cr.