With this information, you can calculate the quantity of leagues 20 miles is equal to.

¿What is the inverse calculation between 1 league and 20 miles?

Performing the inverse calculation of the relationship between units, we obtain that 1 league is 0.15 times 20 miles.

Which is the same to say that 20 miles is 6.6666667 leagues.

Twenty miles equals to six leagues. *Approximation

A league is zero times twenty miles. *Approximation