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A 48 cm chord of a circle lies 7 cm from the centre. What is the radius of the circle? (answer in cm)

Competition practiceGeometry
  • A25
  • B24
  • C31
  • D27

Step-by-Step Solution

The perpendicular from the centre bisects the chord, so half-chord = 24 cm. Radius = √ √(576 + 49) = √625 = 25 cm.
Answer: A) 25

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