$\"\"$

Radius of the circle with centre $\"\"$ is $\"\"$ .

The central angle of two cirles is same, that is $\"\"$ .

The area of sector of the larger shaded region is $\"\"$ .

Area of a sector of the circle $\"\"$ .

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$

Central angle is $\"\"$ radians. $\"\"$

Find the area of smaller shaded region.

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$

Area of smaller shaded region is $\"\"$ .

Correct answer is B.

$\"\"$

Correct answer is B.