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

Explanation

Difference between Greenwich and Thimphu (Bhutan) = 90⁰ of longitudes Total time difference = 90 × 4 = 360 minutes = 360/60 hours = 6 hour = 6 hours/Local time of Thimpu is 6 hours more than that at Normally, there is difference of 4 minutes per 1° longitude. Therefore, at 90° longitude, there will be a difference of 90×4 = 3600 minutes, or 6 hours. Therefore, the local time in Thimphu, located at 90° east longitude, will be 6:00 P.M., when it's 12:00 noon at Greenwich (0°). Greenwich i.e. 6.00 p.m.