Asia is about 3 times the size of antarctica together the 2 continents make up 2/5 of earth's land . what fraction of earth's land does antarctica make up?

1/4 * 2/5 = 2/20 = 1/10

As = Asia's land

An = Antarctica's land

L = Earth's land

As = 3 An

As + An = 2 L / 5

3 An + An = 2 L / 5

4 An = 2 L / 5 Multiply both sides by 5

4 * 5 An = 2 L

20 An = 2 L Divide both sides by 20

An = 2 L / 20

An = L / 10

To find the fraction of Earth's land that Antarctica makes up, we need to subtract the fraction of land that Asia occupies from the total fraction of land occupied by both Asia and Antarctica.

Given that Asia and Antarctica together make up 2/5 of Earth's land, we can represent this as:

Total fraction of land = 2/5

Since Asia is about 3 times the size of Antarctica, we can say that Asia occupies 3 parts out of the total 3 + 1 = 4 parts occupied by both continents.

So, the fraction of land occupied by Asia is 3/4.

To find the fraction of land occupied by Antarctica, we subtract the fraction of land occupied by Asia from the total fraction of land:

Fraction of land occupied by Antarctica = Total fraction of land - Fraction of land occupied by Asia
= 2/5 - 3/4

To perform the subtraction, we need to express the fractions with a common denominator:

Fraction of land occupied by Antarctica = (2/5)*(4/4) - (3/4)*(5/5)
= 8/20 - 15/20

Now, subtract the numerators:

Fraction of land occupied by Antarctica = (8 - 15)/20
= -7/20

Therefore, Antarctica makes up -7/20 of Earth's land. Note that the negative sign indicates that the fraction is less than zero, implying that Antarctica does not contribute any land to the total fraction mentioned in the question.