An empty rectangular container has a capacity of 53 ℓ and a height of 50 cm. At 6 a.m., Tap T is turned on to fill the container at a rate of 9 ℓ per minute for 19 minutes. After 6 minutes, Tap U is turned on to drain water from the container at a rate of 8 ℓ per minute for 11 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 
9 ℓ = 9000 cm³ 
8 ℓ = 8000 cm³ 
53 ℓ = 53000 cm³

Volume of water flowed in from Tap T
= 19 x 9000
= 171000 cm³

Volume of water from drained from Tap U
= 11 x 8000
= 88000 cm³

Volume of water left in the container
= 171000 - 88000
= 83000 cm³

Base area of the container
= 53000 ÷ 50
= 1060 cm² 

Height of water left in the container
= 83000 ÷ 1060
≈ 78.3 cm

Answer(s): 78.3 cm