Answer:
Step-by-step explanation:
The circumference formula for a circle is
[tex]C=2\pi r[/tex] or [tex]C=\pi d[/tex]
We'll use the second one since our problem wants us to find diameter. If we know that the circumference is 30π, then we will sub in 30π for C and solve for d:
30π = πd so
30π/π = d
The π's cancel out, leaving us with a diameter of 30 inches.
