An empty rectangular container has a capacity of 189 ℓ and a height of 36 cm. At 9 a.m., Tap Z is turned on to fill the container at a rate of 6 ℓ per minute for 19 minutes. After 9 minutes, Tap A is turned on to drain water from the container at a rate of 5 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 
6 ℓ = 6000 cm³ 
5 ℓ = 5000 cm³ 
189 ℓ = 189000 cm³

Volume of water flowed in from Tap Z
= 19 x 6000
= 114000 cm³

Volume of water from drained from Tap A
= 11 x 5000
= 55000 cm³

Volume of water left in the container
= 114000 - 55000
= 59000 cm³

Base area of the container
= 189000 ÷ 36
= 5250 cm² 

Height of water left in the container
= 59000 ÷ 5250
≈ 11.2 cm

Answer(s): 11.2 cm