Oceans

The Earth's surface is approximately 510,000,000 km² and is 7/10 covered by oceans. Of which 1/2 covers the Pacific Ocean, the Atlantic Ocean 1/4, the Indian Ocean 1/5, and the Arctic Ocean 1/20. What parts of the Earth's surface cover each ocean?

Final Answer:

T =  178500000 km²
A =  89250000 km²
I =  71400000 km²
L =  17850000 km²

Step-by-step explanation:

$$\begin{gathered} Q=510000000{\text{km}}^2 \\ W=\frac{7}{10}\cdot Q=\frac{7}{10}\cdot 510000000=\frac{7\cdot 510000000}{10}=\frac{3570000000}{10}=357000000{\text{km}}^2 \\ T=W\cdot \frac{1}{2}=357000000\cdot \frac{1}{2}=\frac{357000000\cdot 1}{2}=\frac{357000000}{2}=178500000{\text{km}}^2 \end{gathered}$$

$A=W\cdot \frac{1}{4}=357000000\cdot \frac{1}{4}=\frac{357000000\cdot 1}{4}=\frac{357000000}{4}=89250000{\text{km}}^2$

$I=W\cdot \frac{1}{5}=357000000\cdot \frac{1}{5}=\frac{357000000\cdot 1}{5}=\frac{357000000}{5}=71400000{\text{km}}^2$

$L=W\cdot \frac{1}{20}=357000000\cdot \frac{1}{20}=\frac{357000000\cdot 1}{20}=\frac{357000000}{20}=17850000{\text{km}}^2$

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