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      Question

      The ratio of the curved surface area to the total

      surface area of a cylinder is 3:5. If the curved surface area is 1848 cm┬▓, find the height of the cylinder.
      A 21 cm Correct Answer Incorrect Answer
      B 18 cm Correct Answer Incorrect Answer
      C 32 cm Correct Answer Incorrect Answer
      D 44 cm Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, CSA/TSA = h/(h+r) = 3/5 => 2h = 3r. 2pir*h = 1848. Sub r = 2h/3. Solving gives h = 21.

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