The ratio of land to water on the whole earth is 1 : 2 and in the Northern Hemisphere, it is 2 : 3. What is the ratio of land to water in the Southern Hemisphere?
A
4:11
B
3:12
C
5:10
D
2:13
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Correct Answer 4:11
Explanation
Assume total earth 30 units (10 Land, 20 Water). Northern hemisphere = 15 units (6 Land, 9 Water). Southern hemisphere = 15 units (10-6=4 Land, 20-9=11 Water). Ratio = 4 : 11.