Question

calculate the time on longitude 45°W when it is noon at Greenwich​

Answer 1

Given: Time of Greenwich noon

To find time of - longitude at 45

Difference between longitude-

= 0-45°45

Difference in local time = 45 x4

= 180 minutes

=180 ÷ 60 minutes

= 3 hours

45° W is to the west of Greenwich.

Local time of Greenwich is 12 noon

Therefore at the 45'north is

= 12 - 3

= 9am

The time at 45°north will be 9am