Q41. - Algebra 1

Question

The amount of Earth’s surface is covered by land.

Step-by-Step Solution

Answer

$\frac{3}{10}$ of Earth’s surface is covered by land.

Step 1.

About $\frac{7}{10}$ of Earth’s surface is covered by water.

Step 2. Concept.

If a complete circle is divided into two parts and if the proportion of one part is x, then the proportion of the second part is $1-x$.

Step 3. Calculation.

Consider the provided statement “about $\frac{7}{10}$ of Earth’s surface is covered by land.”

 

Recall that if a complete circle is divided into two parts and if the proportion of one part is x, then the proportion of the second part is 1 - x.

 

Here, Earth represents the one circle that is divided into two parts i.e., land and water. The proportion of water is given as $\frac{7}{10}$.

 

So, Earth’s surface covered by land is,

$1-\frac{7}{10}=\frac{10-7}{10}$

            $=\frac{3}{10}$

Hence, $\frac{3}{10}$ of Earth’s surface is covered by land.