Question

calculate the length of diameter of a circle if its circumference is 132 m​

Answer 1

let the radius =r

circumference of circle=132cm

132 cm = 2×22/7×r

132 = 44/7×r

132×7/44 = r

21 cm= r

d= 2r

d = 2 × 21

d = 42

Answer 2

Answer:

Circumference of circle=2πr

But circumference of the given circle=132m

therefore,

2πr = 132

r = 132×1/2× 7/22

r = 21

Therefore Radius is 21m

Diameter = 2×radius

=2×21

=42 m