this one has lots of words.. but i dont get it ...

AUTOMOBILE tires ate mounted on circular metal rims. if a tire rim has a 13- inch diameter, what is its circumference?

Question

this one has lots of words.. but i dont get it ...

AUTOMOBILE tires ate mounted on circular metal rims. if a tire rim has a 13- inch diameter, what is its circumference?

anonymous · Answer

my begging was to grab ur attention lmao and i suck... ;D

anonymous · Answer

circumference is given by $$C = 2\pi r$$ Since we have the diameter and not the radius, we first need to use the fact that the diameter is two times the radius. So if d = 13, then $$r = \frac{13}{2}$$ Now you just plug this r into the circumference formula.

anonymous · Answer

OK TY.