Question

If the ciecuference of a circle is 66cm find its diameter.explanation​

Answer 1

Answer:---

Circumference of circle=2πr

66=2(22/7)r

66/2=(22/7)r

33*7/22=r

21/2cm=r

Therefore, radius of circle is 21/2 cm

Diameter=2x radius

=2(21/2)

Therefore ,

Diameter of circle is 21cm

Answer 2

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Circumference of the circle= 2πr

66cm=2×22/7 × r

66×7/22 ×1/2= r

r = 21/2 cm

Hence, radius = 21/2cm

so,

diameter = 2(radius)

= 2 ×21/2cm

diameter = 21cm

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