Question

the area of a square plot is 800sq.m . find the estimated length of the side of the plot

Answer 1

Suppose length of each side of square plot is a m.
Then, area of square plot = $a^2=800{\mathrm{m}}^2$
$$\begin{gathered} \Rightarrow a=\sqrt{800} \\ \Rightarrow a=\sqrt{2\times 400}=20\sqrt{2} \\ \Rightarrow a=20\times 1.414=28.28\approx 28 \end{gathered}$$
Therefore approximate length of each side of square plot is 28 m.