The volume of wire can be calculated as follows:
V_wire = πr²l
where r is the radius of the wire, and l is the length of the wire.
Substituting the given values, we get:
V_wire = π(3.0 mm)²(200 m) = 1.8 x 10⁶ mm³
To calculate the radius of the sphere, we need to use the formula for the volume of a sphere:
V_sphere = (4/3)πr³
Equating the volume of the wire to the volume of the sphere, we get:
(4/3)πr³ = 1.8 x 10⁶ mm³
Solving for r, we get:
r = (3V_wire/4π)^(1/3)
r = [(3 x 1.8 x 10⁶)/(4π)]^(1/3)
r ≈ 20.15 m
Therefore, the radius of the sphere is approximately 20.15 meters.