Republic 3988

The Czech Republic has an area of ​​78866 km². If this area were the area of a square, it would have a side of 280.83 km. How long before we go around this square at 50 km/h?

Correct answer:

t =  22.4664 h

Step-by-step explanation:

$$\begin{gathered} a=280.83 \\ v=50 \\ S=a^2=280.83^2=78865.4889 \\ s=4\cdot a=4\cdot 280.83=\frac{28083}{25}=1123.32 \\ t=s/v=1123.32/50=22.4664\text{h} \end{gathered}$$

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