Question

The ratio of radius is $5:6$ Find ratio of areas

Answer 1

The ratio is $5:6$

Let the common factor be $x$

The area is $\pi r^2$

The ratio of areas is $\frac{\pi r_1^2}{\pi r_2^2}={\left(\frac{r_1}{r_2}\right)}^2={\left(\frac{5}{6}\right)}^2=\frac{25}{36}$