Assume that Earth and Mars are perfect spheres with radii of 6,371 km and 3,390 km, respectively. a. Calculate the surface area of Earth. b. Calculate the surface area of Mars. c. If 0.72 (72 percent) of Earth's surface is covered with water, compare the amount of Earth's land area to the total surface area of Mars.

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Md Ariful Islam · Answer 1 · Apr 06, 2024 06:31:56

We'll use the formula $( A = 4 $pi r^2 $) where $( r = 6371 $) km:

$[ A_{$text{Earth}} = 4 $times 3.14159 $times (6371)^2 $, $text{km}^2 $]

We'll use the formula $( A = 4 $pi r^2 $) where $( r = 3390 $) km:

$[ A_{$text{Mars}} = 4 $times 3.14159 $times (3390)^2 $, $text{km}^2 $]

Given that 72% of Earth's surface is covered with water, we'll calculate the land area of Earth as $( 0.28 $times A_{$text{Earth}} $).

Then, we'll compare the land area of Earth to the total surface area of Mars.

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