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Which 11th-century Persian-language scholar attempted to estimate the Earth's diameter and mapped its round shape?
AAlberuni
BGalileo
CIbn Batuta
DMarco Polo
Answer & Solution
Correct answer: A. Alberuni
1. The 'Do you know?' box names a scholar who visited India with Mahmud of Ghazni (973–1049 CE).
2. Alberuni tried to estimate the diameter of the Earth.
3. His latitude-longitude method was accurate for the era.
4. He prepared a map of the Earth showing its round shape.
_Source: Maharashtra Balbharati Std XII History, Ch 1 "Renaissance in Europe and Development of Science", §1.5 ¶6_
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