An empty rectangular container has a capacity of 43 ℓ and a height of 200 cm. At 9 a.m., Tap B is turned on to fill the container at a rate of 8 ℓ per minute for 19 minutes. After 11 minutes, Tap C is turned on to drain water from the container at a rate of 9 ℓ per minute for 15 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 
8 ℓ = 8000 cm³ 
9 ℓ = 9000 cm³ 
43 ℓ = 43000 cm³

Volume of water flowed in from Tap B
= 19 x 8000
= 152000 cm³

Volume of water from drained from Tap C
= 15 x 9000
= 135000 cm³

Volume of water left in the container
= 152000 - 135000
= 17000 cm³

Base area of the container
= 43000 ÷ 200
= 215 cm² 

Height of water left in the container
= 17000 ÷ 215
≈ 79.1 cm

Answer(s): 79.1 cm