"A copper wire of length 36 m and diameter 2 mm is melted to form a sphere
Channel: Doubtnut
Date: 2020-04-05

"A copper wire
 of length 36 m and diameter 2 mm is melted to form a sphere. The radius of
 the sphere (in cm) is
(a) 2.5 (b) 3 (c) 3.5 (d) 4"