1. Scale may be given in 2 ways
Units not given (1 : )
Units given (1cm ≡ 5km or 1cm : 5km)
If the ratio has no units, then this means that the numbers are of the same units!
What units are you most likely to use on a map?
On a map, we will most likely be dealing with centimetres, this means that 1cm corresponds to 500,000cm (5km) in real-life!

2. On a map 1cm represents 2km
On a map 1cm represents 2km. What distance on the map will represent a real distance of 12 km
MAP : ACTUAL 1 cm : 2 km ? : 12 km
x 6
x 6
6cm
6cm

3. A map has a scale of 1 : How much is a distance of 10cm on the map, in real life? Give your answer in metres!
MAP : ACTUAL 1 : : ?
x 10
x 10
2,500 m

4. On a map 1 cm represents 5 km
On a map 1 cm represents 5 km. Work out the real distance between two towns if their distance apart on the map is 4.2 cm
MAP : ACTUAL 1 cm : 5 km 4.2 cm : ?
x 4.2
x 4.2
21km
21km

5. A map has a scale of 1 : How much is a distance of cm in reality shown on the map Give your answer in centimetres!
MAP : ACTUAL 1 : ? :
x 7
x 7 7
7cm

6. A map has a scale of 1 : Work out the distance on the map between two towns if the real distance is 7 km
MAP : ACTUAL 1 : ? : 7 km :
x 7
x 7 7
7cm

7. The scale of a map is 1 : On the map, the distance between two towns is 9cm. Work out the real distance between the towns. Give your answer in kilometres
MAP : ACTUAL 1 : cm : ?
x 9
x 9
1.8 km

8. Exit Questions A. The scale of a map is 1 : 5 000 000.
The distance between Leeds and London on this map is 6.5 cm.
Calculate the actual distance between Leeds and London. Give your answer in kilometres.
B. The scale of a map is 1cm : 50 km.
If the actual distance from A to B in real life is 200km. How far away are A and B on the map?

9. Homework – Map Ratios
STP 8 Page 100 Exercise 5d 1,3,5,7,9,10