Question

when it is 9 am in India, what would be the time at 82 degrees 30 mins West longitude

Answer 1

We know that 1 degree =4min.
Therefore 82 degree 30 min.=4×82 +30
=328 min.+ 30min.
=348 min.
1 hour =60 min
So, 348/60=5 hours 8 min.
As the place is in the west of prime meridian,the time will be subtracted.
So,9 am + 5 hours 8 min.= 2:08pm
The time of a place at 82 degree 30 min. is 2:08pm.

Answer 2

According to the geography,every 1° longitudinal distance is equals to the time of approximately 4 mins.

So according to the data mentioned in the question,the time difference will be;

= 82° 30mins

= {(82×4)+30} mins

= 358 mins

= 5 hrs 58 mins

Now,the time is subtracted from the given time if we travel towards the west direction.

So,the time at the difference of 82°32 mins will be;

= 9 a.m - 5hrs 58 mins

= 3:02 a.m (answer.)