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Question

Geometry:

If the area of a circle is 'A', radius of the circle is 'r' and circumference of it is 'C', then _____

  • (A/r) = C
  • rC = 2A
  • AC = (r2/4)
  • (C/A) = (r/2)
  • None of these
Answer- B

Area of the circle, A = πr2 => (A/r) = πr

Circumference, C = 2πr

C = 2 (A/r)

Then, rC = 2A