Question

What is the radius of circle having 132cm as circumference

Answer 1

132=2×pi×r

Pi×r=132/2=66

r=66×7/22

r=21cm

Answer 2

$\mathbb{ SOLUTION }$ :

Given :
Circumference of circle is 132 cm

We know that,
Circumference of circle = 2πr

=> 132 = 2 × $\frac{22}{7}$ × r

=> 132 = $\frac{44}{7}$ × r

=> 132 × $\frac{7}{44}$ = r

=> 21 = r

Hence, the radius of the circle is 21 cm