Final answer:
The scale of the map is found by dividing the map distance by the real distance, which results in a scale of 1:60,000, meaning each centimeter on the map represents 60,000 real-world centimeters.
Step-by-step explanation:
The scale of the map is calculated as the ratio of the map distance to the actual distance. First, we convert the real distance from kilometers to centimeters to match the map's units. Since there are 100,000 centimeters in one kilometer (1 km = 100,000 cm), we multiply 1.8 km by 100,000 cm/km to get 180,000 cm. Then, we divide the map distance in centimeters by this actual distance in centimeters to find the scale.
Scale = Map Distance / Real Distance = 3 cm / 180,000 cm = 1/60,000
The scale of the map is 1:60,000. This means that each centimeter on the map represents 60,000 centimeters in reality.