Indian Standard Time is calculated on the basis of 82.30 ' E longitude, in Kakinada, (16 ° 35 ′ N 82 ° 09 ′ E ﻿ / ﻿ 16.58 ° N 82.15 ° E ﻿ / 16.58; 82.15) which is nearly on the corresponding longitude reference line.
state the longitudinal value in degrees of indian standard time
82.30 '