Question

The circumference of two circles are in the ratio 2 is to 3. Fin the ratio of their areas

Answer 1

Answer:

circumference =2 pi r

$\frac{2\pi \times r}{2\pi \times r} = \frac{2}{3} \\ so \: \frac{r1}{r2} = \frac{2}{3 } \\ for \: area \\ \frac{\pi \times (r1)2}{\pi \times {(r2)}^{2} } = \\ \frac{ {(2r)}^{2} }{ {(3r)}^{2} } = \frac{4 {r}^{2} }{9 {r}^{2} } \\ = \frac{4}{9}$

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