A model car has a scale factor of 1/64 The diameter of a tire on the model is 0.39 inches. So, the diameter of the tire on an actual car must be how many inches. Your answer must be correct to one decimal place.

This is the concept of scale factors, given that the length of the model which has been modeled by scale factor 1/64 is 0.39 inches, then the actual diameter will be:

scale scale factor = (model diameter) / (actual diameter)

where:

actual diameter = (model diameter) / (scale factor)

=0.39 / (1/64)

=24.96 inches