Question 20
What is the area of the shaded region? Take $\pi=22/7$.
Editorial note: The source figure appears on physical page 9 beneath Q21 and is assigned here because Q20 asks for its shaded area. Interpret the two inner circles as congruent and tangent at the large centre, each tangent to the outer circle; 28 labels the outer radius.
Editorial note: The source figure appears on physical page 9 beneath Q21 and is assigned here because Q20 asks for its shaded area. Interpret the two inner circles as congruent and tangent at the large centre, each tangent to the outer circle; 28 labels the outer radius.