Question

The standard time of India has been decided by the local time at 22 degree 30 minutes east longitude​

Answer 1

The IST of India has been decided by the local time at 82.5° E longitude. Explanation: The India standard time is the time that is observed throughout the country and is set by 5h and 30 minutes. The IST is calculated form the 82.5° E in the city of Mirzapur in U.P.

Answer 2

$the \: indian \: standard \: time \: line \: pass \: through \: mirzapur \: up \: by \: 82 \: degee \: thirty \: east \: so \: that \: the \: time \: of \: india \: shows \: same \: at \: all \:$

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