If the circumference of a circle is 8.8 metre, then find its radius.

Given: Circumference of the circle = 8.8 metre

Let the radius of the circle be r metre.

Now, we know that,

$\mathbf{Circumference}\mathbf{ }\mathbf{of}\mathbf{ }\mathbf{circle}\mathbf{=}\mathbf{2}\mathbf{\pi r}$

Substituting the values

$\Rightarrow 2\times \frac{22}{7}\times \mathrm{r} = 8.8$

$\Rightarrow \mathrm{r} = \frac{8.8\times 7}{2\times 22}$

$\mathbf{\Rightarrow }\mathbf{r}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{1}\mathbf{.}\mathbf{4}\mathbf{ }\mathbf{metre}$

Thus, the required radius of the circle is 1.4 m.