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A sphere of diameter 30 cm is drawn into wire of diameter 4 mm. What is the length of the wire that is created from the sphere.



volume of a sphere = 4/3 pi r^3

vol. of the given sphere = 4/3*22/7*15^3 = (88*5*15*15)/7
vol of the cylinder =22/7*.2*.2*h
but, vol of the sphere  = vol. of the cylinder
so,22/7*.2*.2*h = (88*5*15*15)/7
  both 7s cancel out
so, we finally get,
h= [88*5*15*15*100] / [22*4]
  = 112500 cm OR 1125 m

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