If it is 12 noon in New Delhi, what will be the time in London, UK?

What would be the time at 30º East of Greenwich, if it is 12 noon at Greenwich?

If it is 12.00 Noon in India, on which meridian wil it be 7.00 am of the same day?

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

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

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