Answer:
To find the time in London (0° longitude) when the time in Johannesburg (30°E) is 08:00, we need to consider the time difference between the two locations.
The time difference between two locations can be calculated by dividing the difference in longitudes by 15 (since the Earth completes one rotation every 24 hours, and there are 24 hours in a day, so each hour corresponds to 15 degrees of longitude).
London is at 0° longitude, and Johannesburg is at 30°E longitude.
So, the time difference between Johannesburg and London is:
Time difference= 30°/15°÷hour =2 hours
Since Johannesburg is 2 hours ahead of London, if the time in Johannesburg is 08:00, then the time in London would be:
Time in London=08:00−2 hours=06:00
So, the time in London when the time in Johannesburg is 08:00 would be 06:00.
