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Q:

P and Q are center of two circles with radii 9 cm and 2 cm respectively, where PQ = 17 cm, R is the center of another circle of radius x cm, which touches each of the above two circles externally. If ∠PRQ = 90 °, then the value of x is 

  • 1
    7 cm
  • 2
    8 cm
  • 3
    4 cm
  • 4
    6 cm
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Answer : 4. "6 cm "

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