Respuesta :

devishri1977

Answer:

12 miles per hour.

In one hour there are three 20 minutes. so 4*3 = 12 miles

Step-by-step explanation:

[tex]\frac{4}{20}=\frac{x}{60}\\\\\frac{4*3}{20*3}=\frac{x}{60}\\\\ \frac{12}{60}=\frac{x}{60}[/tex]