Question

In our planet earth, 361,419,000 square kilometers of area is covered with water and 148,647,000 square kilometers of area is covered by land. Find the approximate ratio of area covered with water to area covered by land By converting These numbers into scientific notation

Answer 1

Answer :

we can write water covered area of earth = 361,419,000 in scientific notation , As : 3.61419 $\times$ 10⁸ km²
And
land covered area of earth = 148,647,000 in scientific notation , As : 1.48647 $\times$ 10⁸ km²
And

$$\begin{gathered} \frac{Landcoveredareaofearth}{watercoveredareaofearth}=\frac{1.48647\times {10}^8}{3.61419\times {10}^8} \\ \Rightarrow \frac{Landcoveredareaofearth}{watercoveredareaofearth}=\frac{1.48647}{3.61419} \\ \Rightarrow \frac{Landcoveredareaofearth}{watercoveredareaofearth}=\frac{148647}{361419} \\ \Rightarrow Landcoveredareaofearth:watercoveredareaofearth=148647:\hspace{0.17em}361419 \end{gathered}$$