Question

Can anyone solve the questions in the picture

Answer 1

Q. 20.

Area of the shaded portion=308 cm^2
∴Area of the whole circle=(308*2) cm^2=616 cm^2
Area of a circle=2*pi*r^2
⇒616=22/7*r^2
⇒616*7=22*r^2
⇒r^2=(616*7)/22
⇒r^2=196
⇒r=√196
∴r=14cm

Now.
Circumference of a circle=2*pi*r
=2*22/714
=88 cm  Ans.


If it is helpful then please brainliest the answer.