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      Question

      A hollow cylindrical iron pipe has its internal and

      external radii as 14 m and 21 m. respectively, and its height as 14 m. If this pipe is to be painted all over, find the area to be painted. (Use π = 22/7)
      A 4000 m² Correct Answer Incorrect Answer
      B 3562 m² Correct Answer Incorrect Answer
      C 4620 m² Correct Answer Incorrect Answer
      D 5624 m² Correct Answer Incorrect Answer

      Solution

      The correct answer is C

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