Question

________longitude is the Indian Standard Time (IST).
a.80° 30 East longitude
b.82° 30 West longitude
c.82° 30 East longitude
d.82.5° East longitude

Answer 1

Hint: Longitude, is a geographic coordinate that indicates the east–west position of the Earth's surface. It is an angular ratio, usually conveyed in degrees. They connect points with the same longitude.

Complete Answer:
-It is important to accept the local time of some central meridian of a region as the standard time for the region for uniformity.

-The earth is divided into twenty-four time zones, which denotes that each is of one hour. Each zone thus covers 15° of longitude.

-In India, the longitude of 82° E meridian is regarded as the standard time for the whole country and is known as the Indian Standard Time (IST).

-Indian Standard Time which passes through Mirzapur, in Uttar Pradesh is calculated on the basis of 82°30'E longitude. It is located approximately on the corresponding longitude reference line. The Standard Meridian passes through 5 states of India, namely, Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Andhra Pradesh and Telangana.

-Similarly some countries have accepted more than one standard time due to their considerable longitudinal extent.

Hence, the correct option is 'c'.

Note: India and Sri Lanka remain on India Standard Time throughout the year and do not make any alterations for Daylight Saving. India Standard Time runs 1 hour and 30 minutes ahead of Gulf Standard Time.