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IKMC 2025 - Grades 9-10 - Set 2 - Self-study Question 25

IKMC · IKMC 2025 - Grades 9-10 - Set 2 - Self-study

Question 25

The diameter of the inner circle forms part of a diameter of the outer circle. A chord of the outer circle has length 16, is parallel to that diameter and tangent to the inner circle. What is the area of the shaded region?

Question illustration
  1. $36\pi$
  2. $49\pi$
  3. $64\pi$
  4. $81\pi$
  5. It cannot be uniquely determined from this information.