A scale on a map is used to compare one length with another length.
The two locations on the map are 3 centimeters apart.
From the question, a map represents every 18 kilometers with 1 centimeter. Hence:
18 kilometers = 1 centimeter
54 kilometers = ?
Cross Multiply
54 kilometers x 1 centimeter / 18 kilometers
= 3 centimeters.
Therefore, the two locations on the map are 3 centimeters apart.
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