How many hours of time difference will be there between the most western village of Gujarat and the most eastern village of Arunachal Pradesh, Walong?

If the difference of longitudes for the two places is 90°, the time interval between these places will be –

How much is the difference between Indian Standard Time (I.S.T.) and Greenwich Mean Time (G.M.T.)?

When, there is mid-day in the Greenwich, local time of a place is 5 O'clock evening. At which of the following longitude (meridians) that place will be located –

A plane starts flying from 30° northern latitude and 50° eastern longitude and lands at the opposite end of the earth, where will it land –

Which one of the following countries has the maximum time difference from Greenwich Mean Time (GMT) ?