SOLUTION
The circumference of a circle is given as:
[tex]C=\pi d[/tex]The diameter of the circular disc is 3 feet'
It follows:
[tex]\begin{gathered} C=3\pi \\ C=9.4 \end{gathered}[/tex]Therefore the number of revolution is:
[tex]\frac{18}{9.4}=1.9[/tex]Therefore the number of revolution is approximately 2 revolutions
