An empty rectangular container has a capacity of 143 ℓ and a height of 104 cm. At 8 a.m., Tap C is turned on to fill the container at a rate of 4 ℓ per minute for 19 minutes. After 3 minutes, Tap D is turned on to drain water from the container at a rate of 2 ℓ per minute for 19 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 
4 ℓ = 4000 cm³ 
2 ℓ = 2000 cm³ 
143 ℓ = 143000 cm³

Volume of water flowed in from Tap C
= 19 x 4000
= 76000 cm³

Volume of water from drained from Tap D
= 19 x 2000
= 38000 cm³

Volume of water left in the container
= 76000 - 38000
= 38000 cm³

Base area of the container
= 143000 ÷ 104
= 1375 cm² 

Height of water left in the container
= 38000 ÷ 1375
≈ 27.6 cm

Answer(s): 27.6 cm