Question

Find the area of following shape.

Answer 1

Area of shaded region :

$\begin{array}{c}=40\times 40-\left[4\times \frac{\pi }{4}\times {\left(20\right)}^2\right]c{m}^2\\ =\left[1600-400\pi \right]c{m}^2\\ =343.36c{m}^2\end{array}$