The equator

Calculate the length of the equator. Calculate a radius of 6378 km. Round to the nearest thousand. - Procedure and calculation

Correct answer:

x =  40000 km

Step-by-step explanation:

$$\begin{gathered} r=6378\text{ km } \\ {x}_1=2\pi \cdot r=2\cdot 3.1416\cdot 6378\doteq 40074.1559\text{ km } \\ x=[x_1,-3]=[40074.1559,-3]=40000\text{ km} \end{gathered}$$

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