The table below presents information on the top 10 largest countries

Question

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The table below presents information on the top 10 largest countries in the world by land area:

Country    Land area
(sq. km)    Land area
(sq. mi)    Percentage of
Earth's total
land area     Russia  17,098,242  6,601,668  11.48    Canada  9,984,670  3,854,083  6.55    China  9,596,961  3,705,407  6.32    United States  9,147,593  3,531,905  6.05    Brazil  8,515,767  3,287,956  5.65    Australia  7,692,024  2,969,907  5.06    India  2,973,190  1,147,955  1.98    Argentina  2,780,400  1,073,518  1.84    Kazakhstan  2,724,900  1,052,100  1.79    Algeria  2,381,741  919,595  1.57     ( Sort ↕  the table by clicking on the headers)

For each of the following statements, select Infer if the statement can be inferred from the data in the table, otherwise select cannot be inferred.

jaytu · Answer

The total area of the Land is estimated to be approximately 149 million (sq. km) - how this can be infered ?

chetan2u · Answer

We are given land area of a country and then in the last column we are given how much % of total land in earth that land is.

Pick up any country and equate. It would be better to choose some % closer to a factor of 100 incase you are calculating manually.

So, India has 2,973,000 and it is nearly 2% of total land area. 
Thus, 100% of total land area will be  2973000*\frac{100}{2}=2973000*50=148650000=1.49*10^8=149*10^6  or 149 million.

Hope it helps

Gemmie · Answer

The total area of the Land is estimated to be approximately 149 million (sq. km) => Inferred

Try Russia: 17.1 sq. km accounts for 11.48% of total Land area => Total: 149 sq. km

China, the third largest country by land area, is the largest country by population. => Cannot be inferred

No information regrading population is mentioned

Russia is the largest country in the world by land area, with a land area that is more than twice the size of the fifth largest country. => Inferred

Sort by any of the the three categories regarding land area or percentage of land area

=> The fifth largest is Brazil (5.65% of Total land area)
=> Russia takes 11.48% of Total land area 
 \frac{11.48}{5.65} = 2.03 > 2

Parthsarthi · Answer

Try solving totsl area using Australia's Data and you will get approximately 153mnsqkm. This need not be true

chetan2u · Answer

Yes, you are correct.
From data of few more countries, the land area comes out to be 152 million sq km. But the earth land area cannot change. So, someone was not careful while putting data for the countries.
 
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The table below presents information on the top 10 largest countries

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Country	Land area (sq. km)	Land area (sq. mi)	Percentage of Earth's total land area
Russia	17,098,242	6,601,668	11.48
Canada	9,984,670	3,854,083	6.55
China	9,596,961	3,705,407	6.32
United States	9,147,593	3,531,905	6.05
Brazil	8,515,767	3,287,956	5.65
Australia	7,692,024	2,969,907	5.06
India	2,973,190	1,147,955	1.98
Argentina	2,780,400	1,073,518	1.84
Kazakhstan	2,724,900	1,052,100	1.79
Algeria	2,381,741	919,595	1.57

Inferred	Cannot be inferred
		The total area of the Land is estimated to be approximately 149 million (sq. km)
		China, the third largest country by land area, is the largest country by population.
		Russia is the largest country in the world by land area, with a land area that is more than twice the size of the fifth largest country.