Question:
Machine P prints 40 identical posters per hour while Machine Q prints 90 such posters per hour. Machine P started printing 30 minutes before Machine Q. When the number of such posters printed by Machine P was equal to the number of such posters printed by Machine Q, both machines were switched off to stop the printing. What was the total number of copies printed by the two machines?
Solution:
![P6 / Singapore Chinese Girls / 2019 / SA1 / Paper 2 – Q17 [5 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_Singapore_Chinese_Girls_2019_SA1_Paper2_Q17-Qns.jpg?resize=400%2C152&ssl=1)
![P6 / Nanyang / 2019 / CA1 / Paper 1 – Q30 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/04/P6_CA1_2019_Nanyang_Paper1_Q30-Qns.jpg?resize=400%2C260&ssl=1)