An empty rectangular container has a capacity of 104 ℓ and a height of 200 cm. At 7 a.m., Tap Y is turned on to fill the container at a rate of 4 ℓ per minute for 15 minutes. After 8 minutes, Tap Z is turned on to drain water from the container at a rate of 8 ℓ per minute for 5 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 
8 ℓ = 8000 cm³ 
104 ℓ = 104000 cm³

Volume of water flowed in from Tap Y
= 15 x 4000
= 60000 cm³

Volume of water from drained from Tap Z
= 5 x 8000
= 40000 cm³

Volume of water left in the container
= 60000 - 40000
= 20000 cm³

Base area of the container
= 104000 ÷ 200
= 520 cm² 

Height of water left in the container
= 20000 ÷ 520
≈ 38.5 cm

Answer(s): 38.5 cm