Given:
Radius of in circle (r) = 2 cm
Radius of out circle (R) = 4 cm
To find:
The area of the shaded region.
Solution:
The value of π = 3.14
Area of in circle = πr²
= 3.14 × 2²
Area of in circle = 12.56 cm²
Area of out circle = πR²
= 3.14 × 4²
Area of out circle = 50.24 cm²
Area of the shaded region = Area of out circle - Area of in circle
= 50.24 - 12.56
= 37.68 cm²
The area of the shaded region is 37.68 cm².