if land and water in ratio of1;2 and northeen hemisphere is 2;3 than tell me sothern hemisphere ratio

If land and water in ratio of1;2 and northeen hemisphere is 2;3 than tell me sothern hemisphere ratio

sachinbatra Default Asked on 4th March 2016 in Maths.
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1 Answer(s)

Answer: 4: 11

Solution:-
If the ratio of land and water = 1: 2
Then, the part of the earth = 1/3 and part of water = 2/3

The ratio of earth and water on northern hemisphere = 2: 3
Then, part of earth on norther hemisphere = 2/5 and part of water on northern hemisphere  =  3/5

Getting a common denominator
Then, part of earth and water in the word = 10/30 and 20/30
part of earth and water in northern hemisphere = 6/30 and 9/30

Then, part of earth in southern hemisphere = 10/30 – 6/30
= 4/30
And, part of water in southern hemisphere = 20/30 – 9/30
= 11/30

Then, the ratio of earth and water in southern = (4/30)/(11/30)
= 4/11
= 4: 11

Hence, the correct answer is 4: 11.

Anurag Mishra Professor Answered on 4th March 2016.
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