Question:
A tank measuring 45 cm by 20 cm by 60 cm is 1/4 filled with water. Water is flowing from Tap A into the tank at 9L/min. Water is draining from Tap B at 6L/min. Both taps were turned on at the same time. How long will it take to fill the tank completely with water? Leave your answer in minutes.
Solution:
![P6 / Nan Hua / 2019 / SA1 / Paper 2 – Q15 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_Nan_Hua_2019_SA1_Paper2_Q15-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Henry Park / 2019 / SA2 / Paper 2 – Q15 [5 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/06/P6_Henry_Park_2019_Prelims_Paper2_Q15-Qns.jpg?resize=400%2C260&ssl=1)