Question:
At 8 a.m., a swimming pool was completely filled with water. From 8 a.m. to 1 p.m., water was drained from the swimming pool. The line graph below shows the volume of water in the swimming pool from 8 a.m. to 1 p.m.
During which one-hour period was the decrease in the volume of water the greatest?
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)