Question

Find the distance between riverside and Milton if they are 12cm apart on a map with a scale of 4cm :21km

Answer 1

since 4 cm is 21 km
12 cm is 63 km apart

Answer 2

The answer would be 63km.

I got this by saying:

For every 4cm, there are 21km.

There are 3 sets of 4cm in 12cm.

3*4=12
21*3=63