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      Question

      If the radius of a cylinder is 20 cm and its curved

      surface area is 660 cm2 then find the height of the cylinder?
      A 7 cm Correct Answer Incorrect Answer
      B 10.5 cm Correct Answer Incorrect Answer
      C 8.75 cm Correct Answer Incorrect Answer
      D 12.25 cm Correct Answer Incorrect Answer
      E 5.25 cm Correct Answer Incorrect Answer

      Solution

      According to the question Curved surface area of cylinder = 2πrh where the height of the cylinder = h cm and radius = r 660 = (2 x 22 x 20 x h)/7 h = 5.25 cm

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