If the time is 10.00am in Belfast(longitude 600W), the time at Leningrad(longitude 300E) will be

If the time is 10.00am in Belfast(longitude 60⁰W), the time at Leningrad(longitude 30⁰E) will be

Answer Details

Longitude is the measure of distance east or west of the prime meridian (0 degrees longitude). Each 15-degree interval of longitude represents a time difference of one hour. Belfast is located at longitude 6°W, which is 6 x 15 = 90 minutes (1.5 hours) behind Greenwich Mean Time (GMT). Therefore, when it is 10.00am in Belfast, it is actually 10.00am - 1.5 hours = 8.30am GMT. Leningrad is located at longitude 30°E, which is 30 x 15 = 450 minutes (7.5 hours) ahead of GMT. Therefore, when it is 8.30am GMT, it is actually 8.30am + 7.5 hours = 4.00pm in Leningrad. So the answer is 4.00 pm.