A solid metallic sphere of diameter 8 cm is melted and drawn into a cylindrical wire of uniform width. If the length of the wire is 12 m, find its width.

4/3 *22/7*4*4*4=22/7 *r²*12

r²=4*4*4*4/3*12

r²=64/9

r=8/3

width =diameter

therefore width =2*8/3=16/3

hence found

my above procedure is right but answer is wrong because i didn't convert so please check