Question

the diameter of a sphere is 6 cm. it is melted and drawn into a wire of diameter of cross section 0.2 cm. find length of wire

Answer 1

7200 cm

volume remains constant

volume of sphere =volume of wire

(4/3 )*(22/7) *R^3=(22/7)*r^2* L

pie=22/7 ...L- length ,,r-radius

(4/3)*R^3=r^2 *L

given: R radius of sphere  ...r -radius of wire

(4/3)6*6*6=0.2*0.2*L

L= 7200 cm or 72 m