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About 70% of Earth's surface is water.

About how much of Earth's surface is
water if Earth's diameter is about 7920
miles? Show your work.

2 Answers

3 votes

The surface area of a sphere is given by the formula:

4πr^2

where r is the radius of the sphere. The diameter of Earth is about 7920 miles, so the radius is approximately 3960 miles.

Substituting this value into the formula, we get:

4π(3960)^2 ≈ 197352720 sq miles

About 70% of this area is water, so we can find the amount of water on Earth by multiplying the total surface area by 0.7:

197352720 * 0.7 ≈ 138146904 sq miles

Therefore, about 138,146,904 square miles of Earth's surface is water.

User Portevent
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3 votes

Answer:

completamente respuesta

User Thomas Langston
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