Question 67114
Each time the wheel turns, it traces it's circumference,c, on the
ground, so if it turns 9 times, it traces 9c on the ground.
You are given that the trace of 9c =50 ft.
{{{c = 50/9}}} ft. answer
You don't need to know that {{{pi = 22/7}}}. I think it was
thrown in as useless info.