Question Number 75376 by TawaTawa last updated on 10/Dec/19
Commented by TawaTawa last updated on 10/Dec/19
$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir} \\ $$
Answered by 21042004 last updated on 13/Dec/19
$${Circumference}\:{of}\:{a}\:{pencil}\:{is} \\ $$$$\mathrm{2}\pi{r}=\mathrm{2}\pi\mathrm{7}=\mathrm{14}\pi \\ $$$$\mathrm{1}/\mathrm{4}\:{of}\:{the}\:{circumference}\:{is} \\ $$$$\frac{\mathrm{14}\pi}{\mathrm{4}}=\frac{\mathrm{7}\pi}{\mathrm{2}} \\ $$$${Length}\:{of}\:{the}\:{band}\:{is} \\ $$$$\frac{\mathrm{7}\pi}{\mathrm{2}}\centerdot\mathrm{4}+\mathrm{7}\centerdot\mathrm{4}=\mathrm{28}+\mathrm{14}\pi\approx\mathrm{71}.\mathrm{982} \\ $$
Commented by TawaTawa last updated on 14/Dec/19
$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir} \\ $$