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2 August, 19:39

About 70% of Earth's surface is covered by water. If the diameter of Earth is about 12,750 km, find the area not covered by water to the nearest 100,000 km2.

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  1. 2 August, 20:02
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    Earth diameter = 12,750 km

    Earth radius = 6,375 km

    Sphere Surface Area = 4 • π • r²

    Sphere Surface Area = 4 * 3.141 59 * 6375^2

    Sphere Surface Area = 4 * 3.14159 * 40,640,625

    Earth's Entire Surface Area = 510,704,724 square kilometers

    Surface NOT covered by water = 510,704,724 *.3

    Surface NOT covered by water = 153,211,417 square kilometers
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