Question

explain why Ahmedabad and Kolkata are able to see the noon Sun exactly overhead in a year but not Delhi

Answer 1

during the year the latitude at which the sun is directly overhead cycles between the Tropic of Cancer and the Tropic of Capricorn any place within the tropics will see the sun overhead at noon twice each year the tropics themselves will see it only once each year outside the topics the sun will never be directly overhead in the Northern hemisphere the sun will be directly south at moon