An empty rectangular container has a capacity of 132 ℓ and a height of 125 cm. At 8 a.m., Tap A is turned on to fill the container at a rate of 6 ℓ per minute for 15 minutes. After 8 minutes, Tap B is turned on to drain water from the container at a rate of 3 ℓ per minute for 27 minutes. What is the height of the water level in the container in the end? Give the answer in 1 decimal place.
1 ℓ = 1000 cm³ 
6 ℓ = 6000 cm³ 
3 ℓ = 3000 cm³ 
132 ℓ = 132000 cm³

Volume of water flowed in from Tap A
= 15 x 6000
= 90000 cm³

Volume of water from drained from Tap B
= 27 x 3000
= 81000 cm³

Volume of water left in the container
= 90000 - 81000
= 9000 cm³

Base area of the container
= 132000 ÷ 125
= 1056 cm² 

Height of water left in the container
= 9000 ÷ 1056
≈ 8.5 cm

Answer(s): 8.5 cm