Answer:
9 pm
Step-by-step explanation:
If the local mean time at 45° W is 12:00 noon, what will be the local mean time at 90°E?
Solution:
The lines of longitude run from north to south, measuring distance from east to west of the prime meridian. The line of longitude are used to measure time.
Each 1° = 4 minutes
Change in degrees (we add since it is west and east) = 45° + 90° = 135°
Change in time = 135 * 4 minute = 540 minutes
change in time = 540 minutes = 9 hours
local mean time at 90°E = 12 noon + 9 hours = 9 pm