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The ratio of land to water for the whole earth is 1:2 and 2:3 for the northern hemisphere. What is the ratio of land to water in the southern hemisphere?

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4:11

1:3

1:4

4:7

answer is A.

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Detailed Solution

Concept- In the earth,

is northern hemisphere and other

is the southern hemisphere.
Let,

be the ratio of land and water for the earth
And

be the ratio of land and water for the northern hemisphere
Therefore, given data will be

	Land	Water	Total
Earth
Northern Hemisphere
Southern Hemisphere

Now, the ratio of the land and water of southern hemisphere is

-------(1)
As we know that, northern hemisphere is the

of the earth.
It implies that,

Equation (1) will be,

https://lh3.googleusercontent.com/0cS9E3P-jI7mHeDxyyc9sLocX6N2_Oe9Gkzu61G20QCXuR_N9lkVQgo6IJMkWL50xf2mPLzWh8zfSRbcWP7_4vBP8c9zUjQpv06Va5nUdKHARzI2ds1QvZmJctMp_Z8_JYA3VsjthjSm4qUClEGt1xA

The southern hemisphere has a land-to-water ratio of-

.
Hence, the correct answer is option 1) 4 : 11

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