Is it true that many civilizations took place in the Sahara and Sahel region of Africa in the past? if yes Mention Two civilizat
1 answer:
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Answer:
circumference of Nearth = 27692.30 km
Explanation:
we will apply here Eratosthenes logic that is here in this problem
near the sun is straight overhead at nyene and at same time that is ( 90-77 ) = 13° from zenith at the Alec town
and here 2 city 1000 km apart
so by Eratosthenes relation is
1000 = × circumference of Nearth
circumference of Nearth = 1000 ×
circumference of Nearth = 27692.30 km