Question

Find the diameter of a circle whose circumference is 66 m.

Answer 1

Let the diameter of a circle be $dm$

Given circumference of the circle is $66m$

$⟹\pi d=66$

$⟹\frac{22}{7}\times d=66$

$⟹d=\frac{66\times 7}{22}=21m$

So the diameter is $21cm$