Answer :
The area of the shaded region = 330 sq cm
Step-by-step explanation:
Given,
The radius of small circle (r) = 4 cm
The radius of large circle (R) = 11 cm
To find the shaded region
Formula
The area of circle of radius r = π[tex]r^{2}[/tex] sq cm
So, The radius of the small circle = π×[tex]4^{2}[/tex] sq cm = 16π sq cm
The radius of the large circle = π×[tex]11^{2}[/tex] sq cm = 121π sq cm
Hence the area of the shaded region = 121π-16π sq cm
= 105π sq cm
= 105 × [tex]\frac{22}{7}[/tex] sq cm = 330 sq cm
Answer: 329.7
Step-by-step explanation:
Area of circle = \pir^{2}
Area of circle with radius of 4 cm = 3.14 * 4 * 4 = 50.24
Area of circle with radius of 11 cm = 3.14 * 11 * 11 = 379.94
Their difference = 329.7