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      Question

      12 spheres of the same size are made by melting a solid

      cylinder of 12cm diameter and 12cm height. The Diameter of each sphere is.
      A 6cm Correct Answer Incorrect Answer
      B 8cm Correct Answer Incorrect Answer
      C 9cm Correct Answer Incorrect Answer
      D 4cm Correct Answer Incorrect Answer

      Solution

      Diameter =12cm, r = 6cm Volume of 12 spheres = Volume of cylinder 12Γ—4/3Γ— Ο€R3 = Ο€ Γ—82Γ—2 R3 = (36 Γ—12Γ—3)/12Γ—4 =27cm r= 3cm. Diameter = 2Γ—3 =6cm

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