Question

The scale on a map is 1 cm:30 km. How many centimeters would be used to represent 45 kilometers?

Answer 1

1.5 cm.

Explanation:

If 1 cm = 30 km, then half a cm equals 15 km.

We need to find 45 km. We know that 1 cm = 30km and half a cm = 15 km. Adding both of these together, we can get 1.5cm = 45km.