Question:
A square hall ABCD is fitted with a semi-circle stage as shown. The shaded stage has the side DC of the hall as its diameter and a perimeter of 40 m. The perimeter of the unshaded part of the hall is 64 m. What is the area of the shaded stage in terms of π?
Solution:
![P6 / Nan Hua / 2019 / SA1 / Paper 2 – Q12 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_Nan_Hua_2019_SA1_Paper2_Q12-Qns.jpg?resize=400%2C124&ssl=1)