Question

How to find the radius of a circle from circumference. Eg : circumference = 44cm

Answer 1

$$\begin{gathered} \mathrm{Let}\mathrm{r}\mathrm{be}\mathrm{the}\mathrm{radius}. \\ \mathrm{Now},\mathrm{circumference}=44\mathrm{cm} \\ \Rightarrow 2\mathrm{\pi r}=44 \\ \Rightarrow 2\times \frac{22}{7}\times \mathrm{r}=44 \\ \Rightarrow \mathrm{r}=7 \\ \mathrm{So},\mathrm{radius}=7\mathrm{cm} \end{gathered}$$