What will happen if you are flying east across the International Date Line?

The Prime Meridian does not pass through which one of the following African countries? 

Piecing together the puzzle of geologic time to create and analyze historical maps of the Earth is known as

Consider the following statements on computation of density :

1. Physiological density can be computed by dividing the total population by the net cultivable area.

2. Agricultural density can be computed by dividing the total agricultural population by the net cultivable area.

3. Population density can be computed by dividing the total population by the total area.

How many of the above statements is/are correct?