Question

Find the area of a circle whose circumference is 52.8cm

Answer 1

Given ;
Circumference of the circle = 52.8 cm
Radius = ?
=================
Circumference = 2πr
52.8 = 2×(22/7)×r
r = 26.4 × 7/22
r = 8.4 cm
_______________
Area = π×(r×r)
= (22/7)×(8.4×8.4)
= 221.76
_______________
Hence the area of a circle is 221.76 cm sq.

Answer 2

Given:-
Circumference of circle = 52.8cm

Area of circle = circumference²/4π
= 52.8cm/4*22/7
= 221.85cm² Ans.

Ans.) The area of circle is 221.85cm².