Question:
A schedule of an on-line course is as shown. One activity leads to another without any break in between.
Mrs Lee was 5 minutes late for the Zoom session. She left 10 minutes before the end of the Question-and-Answer session. How long did Mrs Lee attend the on-line course?
Solution:
![P6 / CHIJ / 2019 / SA2 / Paper 2 – Q15 [5 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/06/P6_CHIJ_2019_Prelims_Paper2_Q15-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Ai Tong / 2020 / SA2 Prelims / Paper 1 – Q30 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/08/P6_SA2_2020_Ai_Tong_Paper1_Q30-Qns.jpg?resize=400%2C241&ssl=1)