Question:
In a 4 by 100 m relay, Rani completed the first 100 m in 10 s, Eunice completed the second 100 m in 15 s, Joyce completed the third 100 m in 13 s and Siti completed the last 100 m in 12 s. What was the average speed of the 4 children for the relay?
Solution:
![P6 / Catholic High / 2020 / SA2 Prelims / Paper 1 – Q09 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/06/P6_SA2_2020_Catholic_High_Paper1_Q09-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Maris Stella / 2020 / SA2 Prelims / Paper 1 – Q04 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/12/P6_SA2_2020_Maris_Stella_Paper1_Q04-Qns.jpg?resize=400%2C260&ssl=1)