Question

what is the diameter of circle of the circumference is 30 cm​

Answer 1

Answer:

$\frac{30}{\pi}$

Step-by-step explanation:

well the circumference is

$2\pi(r)$

where the 2r means the diameter as radius is half of the diameter of a circle

so we can write this as

$d\pi$

where d is diameter

so here

circumference = d(pi) = 30

so, d = 30/pi