If it is 10:00 a.m. Indian Standard Time, then what would be the local time at Shillong located at 92oE longitude?

a) 9:22 A.M.
b) 9:38 A.M.
c) 10:22 A.M.
d) 10:38 A.M.

Ans- d

Explanation– IST meridian passes through 82.5 degree .

Differenc between two given longitudes= 9.5 degrees.

As we know 1 degree= 4 minutes, therefore 9.5 degrees= 4 x 9.5= 38 minutes.

Thus, time is 10+38 minutes= 10:38 AM