Question

find the radius of the circle whose circumference is 57.2cm .
$\pi = 22 \div 7$

Answer 1

Hey...!!!


Circumference = 57.2 cm
So,
2 x pi x R = Circumference
2 x 22/7 x R = 57.2
44/7 x R = 57.2
R = 57.2 x 7/44
R = 9.1 cm
So, the radius = 9.1 cm


Hope it helps...!!!

Answer 2

Hey!

Circumference of circle=2*pi*r

=)57.2=2×22/7×r

=)r=400.4/44

=)r= 9.1 cm

Hope it helps u.