Answer:
1 to 100,000
Step-by-step explanation:
Centimeters and kilometers are scales of the official unit of length in the SI, the meters.
In a meter there are 100 centimeters, and in a kilometer there are 1000 meters, so in a kilometer there are 1000(100)cm ⇒ 100,000cm
So the scale of 1 centimeter to 1 kilometer is:
1 to 100,000
