Question

Find the area of the shaded region in each of the following​

Answer 1

$\huge\bf\underline{Solution:}$

For the outer rectangle

Length = 3 + 12 + 3 = 18m

Breadth = 2 + 9 + 2 = 13m

For the inner rectangle

Length = 12m

Breadth = 8m

Area of shaded region

= Area of outer rectangle - Area of inner rectangle

=$l_{1}b_{1}×l_{2}b_{2}$

=18 × 13 - 12 × 8

=234-96

=138

Therefore,the area of shaded region is 138 $\sf{m^2}$.