Question

Find the area of a square, if its side become $\frac{2}{5}$ times of its original length.

Answer 1

Let original length be x

Area of square

Given: $y=\frac{2}{5}x$

Area of square is $y^2={\left(\frac{2}{5}x\right)}^2=\frac{4}{25}{x}^2$

Area of square is $\frac{4}{25}{x}^2$.