What is the size of the Earth's surface?

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What is the size of the Earth's surface?

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Answer 1 · 2015-12-21T23:51:50

Use the formula for the surface area of a sphere to get an approximate value of $200, 000, 000 = 2 \times 10^{8}$ $200,000,000 = 2xx10^8$ square miles

Explanation:

The surface area of a sphere of radius $r$ $r$ is $4 π r^{2}$ $4 pi r^2$

The radius of the Earth is approximately $4000$ $4000$ miles

So the surface area of the Earth is approximately:

$4 π 4000^{2} \approx 200$ $4 pi 4000^2 ~~ 200$ million square miles

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What is the size of the Earth's surface?

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