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      Question

      A metal sphere of radius 7.35 cm

      is melted and cast into a cylinder of height 12 cm. Find the curved surface area of the cylinder.
      A 654.4 cm² Correct Answer Incorrect Answer
      B 554.4 cm² Correct Answer Incorrect Answer
      C 556.4 cm² Correct Answer Incorrect Answer
      D 782.5 cm² Correct Answer Incorrect Answer

      Solution

      Let the radius of the cylinder be 'r' cm. ATQ,

      Thus, the curved surface area of the cylinder = 2×π× radius × height

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