# General Knowledge - Indian Geography - Discussion

### Discussion :: Indian Geography - Section 1 (Q.No.69)

69.

When it is noon IST at Allahabad in India, the time at Greenwich, London, will be

 [A]. midnight ,GMT [B]. 1730 hours [C]. 0630 hours [D]. None of the above

Explanation:

No answer description available for this question.

 Arvind said: (Sep 18, 2012) No its 5.5 times ahead of GMT. So none of the above.

 Rahul said: (Nov 8, 2012) Can Anyone tell me how to Calculate it?

 Sawmi said: (Dec 14, 2012) The longitude against which Indian Standard time is set passes through Allahabad, India. British India did not adopt the international standard time zones until 1905 when the meridian passing through Allahabad at 82.5 degree east (of Greenwich Meridian) longitude was picked as the central meridian for India, corresponding to a single time zone for the country at 5 hours and 30 minutes in advance of GMT. This went into force on January 1, 1906. However, Calcutta time was officially maintained as a separate time zone until 1948. Bombay time was maintained but only informally until about 1955. After independence and the partition of British India, Pakistan stayed on Indian Standard Time for three years and adopted Pakistan Standard Time at 5 hours in advance of GMT in 1951.

 Srujanika said: (Dec 20, 2012) ARVIND, its correct. When it is noon IST at Allahabad in India, the time at Greenwich, London, will be 0630 because its 5. 5 times ahead of GMT. 0630+0530=12. If noon at Greenwich then 1730 in India.

 Vicky said: (Nov 25, 2014) Guys here is a simple rule. When we go towards west then the time decrease and when we go towards east then time increases. So IST is ahead of 0 degree longitude, so to reach the Greenwich time we will have to go towards west so :- 12-5.30 = 6:30.

 Anup Gowda said: (Jan 24, 2015) If we go from west to east we will add 4 min to every 1 degree, so 82.5*4 = 330/60 = 5.5 hr. Therefore 12-5.5 = 6.30 hr.

 Dhiraj said: (Feb 9, 2015) If it is 82.5° of GMT then it should be noon i.e. 12 plus 5.30 equal 17.30 hours.

 Rubesh said: (Oct 21, 2015) IST is 5.5 hr forward in summer and 4.5 hr forward in winter as compare to GMT. If 12 pm here then 6:30 am in GMT in summer and 7:30 am in winter.

 Harpal said: (Dec 31, 2015) Please explain it in more simple way.

 Ramesh said: (Mar 18, 2016) Consider 12:00 noon - 5.30 hrs = 6:30 am at greenwich. @Anup gowda is correct.

 Narasimha said: (Apr 17, 2016) Noontime means 12:00pm we know that the difference between GMT and IST is 5.30hrs So, GMT = 12:00 - 5.30 = 6:30am.

 Tanushree said: (Aug 26, 2017) Every longitude is 4mins then for west we should be added and for the East we should subtract. For example What is the time in Allahabad {82 and a half degree} when it is noon at Greenwich? Each longitude 4 mins then multiply 4 * 82.5. Answer: 5hrs 30 mins now add that's it and subtract in the case of east.

 Mohammad Rizwan said: (Nov 5, 2018) India is 5 hours and 30 minutes ahead of Greenwich, London, UK.