Answer:
21πin²
Explanation:
Area of a sector is given as

r is the radius of the sector
theta is the angle substended by the sector
For the sector shaded orange, its area is expressed as;

For the sector shaded blue, the area is expressed as;

Total area shaded orange or blue = area of the sector shaded orange + area of the sector shaded blue
= 5πin²+16πin²
= 21πin²