Given: Matt rolls an old inflated tire in his backyard. If the outer radius of the tire is 30 centimeters and the tire completes 20 revolution.
Find: the distance that the tire travels.
Explanation: the tire travel distance in 1 revolution is
[tex]\begin{gathered} 2\pi r \\ =2\pi\times30 \\ =60\pi\text{ cm} \end{gathered}[/tex]the tired travel distance in 20 revolution is
[tex]\begin{gathered} 60\pi\times20 \\ =1200\pi cm \end{gathered}[/tex]Final answer: the required answer is
[tex]1200\pi cm[/tex]