Question

Find area of shaded region. Here $ABCD$ a square and $DPBA,CPAB$ are quadrants

Answer 1

Area of square $ABCD=side\times side$

$=(a\times 9)c{m}^2$

$=81c{m}^2$

Area of $2$ quadrant=$2\times \left(\frac{1}{4}\pi r^2\right)$

=$(2\times \frac{1}{4}\times \frac{22}{7}\times 9\times 9)$

$\Rightarrow \frac{81\times 11}{7}=\frac{891}{7}$