Answer: 18.385
Step-by-step explanation: One revolution is 15.2 inches.
This means that:
pi*diameter = 15.2 inches
diameter = 15.2/pi
diameter = 4.8383...
radius = 2.419...
Area of a circle: pi*r^2
Therefore,
pi * 2.419...^2 = 18.38557 inches squared
Rounded to nearest whole number: 18 inches squared