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 / Maha Bodhi / 2019 / SA2 / Paper 2 – Q09 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/06/P6_Maha_Bodhi_2019_Prelims_Paper2_Q09-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Maha Bodhi / 2019 / SA1 / Paper 2 – Q01 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/04/P6_MahaBodhi_2019_SA1_Paper2_Q01-Qns.jpg?resize=400%2C260&ssl=1)