We are given that the radius of the circle is r = 6 m.

Substitute r = 6 m into the formula to obtain d = 2 × 6 = 12 m.

Answer: 12 m

We are given that the radius of the circle is $r = 6\text{ m}$ .

The diameter of a circle is twice the length of its radius, given by the formula $d = 2r$ .

Substitute $r = 6\text{ m}$ into the formula to obtain $d = 2 \times 6 = 12\text{ m}$ .