Question
Find the circumference of a circle whose diameter is: $11.2\ km.$
✓
Answer
We know that the circumference of a circle of radius $r$ is given by $C =2\pi\text{r}$
Here, $d =11.2\text{km}$
Then, $ r =\frac{11.2}{2}=5.6\text{km}$
$\Rightarrow\text{C}=2\times\frac{22}{7}\times5.6=35.2\text{km}$
Here, $d =11.2\text{km}$
Then, $ r =\frac{11.2}{2}=5.6\text{km}$
$\Rightarrow\text{C}=2\times\frac{22}{7}\times5.6=35.2\text{km}$
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