Question:
Tap A and Tap B can fill a tank at a rate of 3 L per minute and 5 L per minute respectively. At first, only Tap A was turned on. When the tank was 1/4-filled with water, Tap B was then turned on. Six minute later, the tank was 7/8-filled with water. How much water was there in the tank just before Tap B was turned on?
Solution:
![P6 / ACS / 2019 / SA1 / Paper 2 – Q04 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/04/P6_ACS_2019_SA1_Paper2_Q04-Qns.jpg?resize=400%2C260&ssl=1)
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