Question:
OPQRS is a part of a circle of diameter 40 cm. OPQR and OQRS are semi-circles. The area of the shaded part OQR is 420 cm² and the perimeter of the shaded part OQR is 78 cm
(a) Find the area of the figure OPQRS.
(b) Find the perimeter of the figure OPQRS.
Take π = 3.14.
Solution:
![P6 / Red Swastika / 2020 / SA2 Prelims / Paper 2 – Q06 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/11/P6_Red_Swastika_2020_SA2_Paper2_Q06-Qns.jpg?resize=400%2C260&ssl=1)