What is 5cm 1km?
1000m = 100 × 1000 cm = 100000cm. now ratio of 5cm to 1km or 100000cm is. 5cm / 100000cm = 1/20000 = 1 : 20000.
How much is 1 cm on a map?
working out what 1 cm on the map is equivalent to as a real life distance. A map has a scale of 1:25000. This means that 1 cm on the map is 25000 cm in real life, which is 250 m or 0.25 km. It is also useful to note that if 1 cm is 0.25 km, then 4 cm will represent 1 km in real life.