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      Question

      Two circles having radii 12 cm and 8 cm, respectively,

      touch each other externally. A common tangent is drawn to these circles which touch the circles at M and N, respectively. What is the length (in cm) of MN?
      A 8√8 Correct Answer Incorrect Answer
      B 8√6 Correct Answer Incorrect Answer
      C 6√8 Correct Answer Incorrect Answer
      D 6√6 Correct Answer Incorrect Answer

      Solution

      The correct answer is B

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