A circular path lies between circles of radii 10 m and 6 m. Its area pi R^2 - pi r^2 equals:

  1. 16pi m²
  2. 94pi m²
  3. 64pi m²
  4. 8pi m²
Answer

C) 64pi m²

pi(R^2 - r^2) = pi(R + r)(R - r) = pi(16)(4) = 64pi m². SLO M-09-A-21 · Application

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