Question:
Cayden drained water from Tank A and Tank B using Tap A and Tap B respectively. For Tank A, he turned on Tap A partially at 11 00 and then fully 4 minutes later. For Tank B, he turned on Tap B fully at 11 04. He left both taps on until water was completely drained from each tank.
The graphs below show the volume of water left in each tank for the period from 11 00 to 11 12.
(a) At what time was the volume of water left the same in both the tanks?
(b) Starting from 11 04, which tank, A or B, had a slower rate of drainage? How much water was drained from this tank?
(c) How many minutes did it take for Tank B be completely drained of water after Tap B was turned on?
Solution:
![P6 / Ai Tong / 2020 / SA2 Prelims / Paper 1 – Q03 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/08/P6_SA2_2020_Ai_Tong_Paper1_Q03-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Ai Tong / 2020 / SA2 Prelims / Paper 1 – Q16 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/08/P6_SA2_2020_Ai_Tong_Paper1_Q16-Qns.jpg?resize=400%2C142&ssl=1)