Question

what do you know about
Radha nath Sikdar ​

Answer 1

Indian mathematician and surveyor Radhanath Sikdar was probably the first person to identify that Mount Everest (then known as peak XV) was the world's highest peak as he was the first person to calculate the height of the mountain in 1852. ... After 100 years, it was rechristened as Sagarmatha by the government of Nepal.
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Answer 2

Explanation:

Radhanath Sikdar (Bengali: রাধানাথ শিকদার; October 1813 – May 17, 1870) was an Indian Bengali mathematician who is best known for calculating the height of Mount Everest.