Q. The area of the Earth's total surface is of the order of ____. (Solved)
1. 510 million square kilometres
2. 450 million square kilometres
3. 400 million square kilometres
4. 350 million square kilometres
- a. 510 million square kilometres
1. 510 million square kilometres
2. 450 million square kilometres
3. 400 million square kilometres
4. 350 million square kilometres