Let diameter of the tire be D.
It turned 29 times and travelled 116 m in distance.
Using the circumference formula,
116=29(2 π r) = 29*(π D) = 29(3.14 D)
Solve for D
D=116/(3.14*29) = 1.274 m.
Answer: The diameter of the tire is 1.27 m (to three significant figures)