A 32 inch diameter tire is rolled down the driveway of a house. How far did it travel if it rolled three complete turns from it’s starting position.

Answer 1

Every time the tire travels for a complete turn, it has traveled its circumference. Three complete turns means it has travelled three times its circumference.

C =2*pi*r so 3C = 3*2*pi*r = 6*pi*r

3C = 6*pi*(32 inches) = 192 pi inches, or approximately 603 inches

Answer 2

The circumference of the tire is 32π inches.

3 complete revolutions would be 96π.