This scale can be used to change between kilometres and miles 30
40
so
miles
9 10
0 10 20
kilometres
20
30
40
50
60
70
RO
(a) Use the scale to change 20 kilometres to miles.
13 miles
Here is an approximate rule to change from kilometres to miles.
Divide the distance in kilometres by 10 and then multiply by 6
(6) Use this approximate rule to change 20 kilometres to miles.
miles
(2)
(c) Compare your answer to part (b) with your answer to part (a).