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      Question

      Calculate the lateral surface

      area of a right circular cone having a radius of 5 cm and a height of 12 cm.
      A 45π cm² Correct Answer Incorrect Answer
      B 65π cm² Correct Answer Incorrect Answer
      C 24π cm² Correct Answer Incorrect Answer
      D 72π cm² Correct Answer Incorrect Answer

      Solution

      Given, Radius of the cone = 5 cm Height of the cone = 12 cm So, slant height of the cone = √(12² + 5²) = √(144 + 25) = √169 = 13 cm Thus, the lateral surface area of the cone = π × radius × slant height = π × 5 × 13 = 65π cm²

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