The Waccamaw Bridge is 80 yards long. The length of a model of the bridge is 20 inches long. What is the scale of the model?
First, we need to convert the length of the bridge from yards to inches.
1 yard is equal to 36 inches. Therefore, 80 yards is equal to 80 x 36 = 2880 inches.
Now, we can calculate the scale of the model by dividing the length of the actual bridge by the length of the model:
Scale = Length of actual bridge / Length of model
Scale = 2880 inches / 20 inches
Scale = 144
The scale of the model is 1:144.