Land and water on earth are in the ratio of 1:2 and ratio of land and water on northern hemisphere is 2 : 3. Find ratio of land and water in southern hemisphere.
Answer & explanation
Correct answer: option 3
Given = The ratio of Land & water on earth is 1 : 2 and the ratio of Land and water in the Northern Hemisphere is 2 : 3
Let the total area of the earth be 30 unit
So in the northern hemisphere area = 15 unit and in Southern hemisphere area = 15 unit
Total land = 1 × \(\frac{30}{3}\) = 10 unit
Total water = 2 × \(\frac{30}{3}\) = 20 unit
Land in the northern hemisphere = 2 × \(\frac{15}{5}\) = 6 unit
Water in the northern hemisphere = 3 × \(\frac{15}{5}\) = 9 unit
∴ The ratio of land and water in the southern hemisphere = (10 - 6) : (20 - 9) = 04 : 11