The local time of a place is 6.00 AM when the Greenwich Mean Time (GMT) is 3:00 AM, what is the longitude of the place?

What is the local time of Thimphu (Bhutan) located at 90° East longitude when the time at Greenwich (0°) is 12:00 noon?

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 –

If it is 10.00 A.M. IST, then what would be the local time at Shillong at 92° E longitude?

The time at Cairo is 2 hours ahead of Greenwich. Hence, it is located at-

When it is noon along 82° 30’ E longitude along what° of longitude it will be 6.30 a.m.?