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Question Number 68930 by Maclaurin Stickker last updated on 17/Sep/19

$$\mathrm{In}\mathrm{the}\mathrm{figure}\mathrm{we}\mathrm{have}7\mathrm{circles}\mathrm{having}$$$$\mathrm{the}\mathrm{same}\mathrm{radius}.\mathrm{Determine}\mathrm{the}\mathrm{ratio}$$$$\mathrm{between}\mathrm{the}\mathrm{perimeter}\mathrm{of}\mathrm{one}\mathrm{of}\mathrm{the}$$$$\mathrm{circle}\mathrm{and}\mathrm{the}\mathrm{perimeter}\mathrm{of}\mathrm{the}\mathrm{gray}\mathrm{region}.$$

Commented by Maclaurin Stickker last updated on 17/Sep/19

Commented by Rasheed.Sindhi last updated on 17/Sep/19

$$\frac{2\pi \mathrm{r}}{6}\times 12=4\pi \mathrm{r}$$$$2\pi \mathrm{r}:4\pi \mathrm{r}=1:2$$

Commented by Maclaurin Stickker last updated on 17/Sep/19

$$Correct.$$

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