Question

what is the time and day at Mumbai (73°E) when it is Sunday 10:30 pm at Shillong (92°E)

Answer 1

Given,
Longitude of Mumbai = 73°E
Longitude of Shillong = 92°E
Time at Shillong = 10:30pm on Sunday
Difference in longitude = 92 - 73 = 19°
Difference in time = 19 × 4 = 76min = 1hr 16min
Time at Mumbai = 10:30 - 1:16
= 9:14pm on Sunday