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Q:

A copper wire is bent in the shape of a square of area 81 cm2. If the same wire is bent in the form of a semicircle, the radius (in cm) of the semicircle is (take π=22/7 ) 

  • 1
    126
  • 2
    14
  • 3
    10
  • 4
    7
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Answer : 4. "7"

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