An empty rectangular container has a capacity of 150 ℓ and a height of 15 cm. At 8 a.m., Tap T is turned on to fill the container at a rate of 10 ℓ per minute for 18 minutes. After 4 minutes, Tap U is turned on to drain water from the container at a rate of 2 ℓ per minute for 8 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 
10 ℓ = 10000 cm³ 
2 ℓ = 2000 cm³ 
150 ℓ = 150000 cm³

Volume of water flowed in from Tap T
= 18 x 10000
= 180000 cm³

Volume of water from drained from Tap U
= 8 x 2000
= 16000 cm³

Volume of water left in the container
= 180000 - 16000
= 164000 cm³

Base area of the container
= 150000 ÷ 15
= 10000 cm² 

Height of water left in the container
= 164000 ÷ 10000
≈ 16.4 cm

Answer(s): 16.4 cm