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      Question

      The diameter of the base of a cylindrical vessel is 20

      cm and its height is 35 cm. Find its curved surface area (in cm²).
      A 1800 Correct Answer Incorrect Answer
      B 2000 Correct Answer Incorrect Answer
      C 2200 Correct Answer Incorrect Answer
      D 1140 Correct Answer Incorrect Answer

      Solution

        Curved surface area = 2 πrh Given Diameter = 20 cm, so radius r = 10 cm Height h = 35 cm Substitute these values: CSA = 2 × 10 × 35 π CSA =700 π Approximating π as 22/7 CSA= 700 × 22/7   =100×22=2200cm²

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