Respuesta :

Tucon
   
[tex]\displaystyle \\ \frac{D_1}{D_2}=5 \\ \\ \\ \frac{\text{Circumference 1}}{\text{Circumference 2}} = \frac{\pi D_1}{\pi D_1} =\frac{D_1}{D_2}=\boxed{5}[/tex]