A park had an actual area of 5km2. Find the area, in square centimetres, of the park on the map
Scale is 1:20000
5km^2 = 5*10^10 cm^2 (1km = 10^5cm)
Scale this down by 20000^2 for the map (map scales are usually linear values)
Area on map = 5*10^10/(2*10^4)^2 cm^2 = 5*10^10/(4*10^8) cm^2 = 125 cm^2
A Shopping mall has an area of 3.2cm^2 on the map.
calculate the are of the actual shopping mall in square kilometres.
