The wheels are 1.33 inches on model car
Solution:
Given that,
A toy car was created using a scale factor of 1 : 12
Wheels on the actual car are 16 inches
To find: Wheels of car on model
Let "x" be the wheels of car on model
Scale factor is 1 : 12
1 : 12
x : 16
Thus we get a proportion as,

Cross multiply to get value of "x"

Thus the wheels are 1.33 inches on model car