Question

The scale of a map is 1 cm: 77 km.

what is the actual distance between two towns that are 3 cm apart on the map?​

Answer 1

`\bf \stackrel{map}{1~cm}\qquad :\qquad \stackrel{actual}{77~km}\qquad \cfrac{map}{actual}=\cfrac{1}{77}~\hfill \cfrac{\stackrel{map}{3}}{\underset{actual}{a}}=\cfrac{1}{77}\implies 231=a`