Final answer:
The scale used for the model airplane, which is 18 cm long while the actual airplane is 60 meters (6000 cm) long, is 1/333.33.
Step-by-step explanation:
The model airplane is 18 cm long, and the actual airplane is 60 meters long. To find the scale used to create the model, we need to convert the actual length to centimeters since the model length is given in centimeters. We know that 1 meter is equivalent to 100 centimeters, so the actual airplane is 60 x 100 = 6000 cm long.
To find the scale of the model, we divide the model's length by the actual length:
Scale = Model length / Actual length
Scale = 18 cm / 6000 cm
Scale = 1/333.33
This is the scale used to create the model airplane.