<h3>✰<u>Given</u>:-</h3>
➾Length(L) of bigger rectangle =
units.
➾Length(l) of smaller rectangle = 9units.
➾Breadth (B) of bigger rectangle =
units.
➾Breadth(b) of smaller rectangle = 4 units.
<h3>✰<u>To Find</u>:-</h3>
➾Area of the shaded region.
<h3>✰<u>Solution</u>:-</h3>
➾We can find the area of shaded region by subtracting area of smaller rectangle from area of bigger rectangle(that is whole rectangle including shaded and non shaded region).
So,
➾<u>Area of bigger rectangle</u> =
(putting the value of L and B from the above given)
= 
= 
Similarly,
➾<u>Area of smaller rectangle</u> =
(putting the value of l and b from the above given)
= 
= 
Now,
➾<u>Area of shaded region</u> = Area of bigger rectangle - Area of smaller rectangle.


Therefore, area of shaded region
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Hope it helps you:)