Question

A map is drawn to scale of 1:20000. Find: The distance on the map representing 4km

Answer 1

Scale = 1:20000
1km = 100000cm
4km = 400000cm

`"distance(map)"/"distance(land)"` = Scale

`"distance(land)"/(400000)" = (1)/(20000)`

4km distance on map

= `(400000)/(20000)`
= 20cm.