An empty rectangular container has a capacity of 60 ℓ and a height of 96 cm. At 9 a.m., Tap C is turned on to fill the container at a rate of 8 ℓ per minute for 15 minutes. After 4 minutes, Tap D is turned on to drain water from the container at a rate of 7 ℓ per minute for 16 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 
7 ℓ = 7000 cm³ 
60 ℓ = 60000 cm³

Volume of water flowed in from Tap C
= 15 x 8000
= 120000 cm³

Volume of water from drained from Tap D
= 16 x 7000
= 112000 cm³

Volume of water left in the container
= 120000 - 112000
= 8000 cm³

Base area of the container
= 60000 ÷ 96
= 625 cm² 

Height of water left in the container
= 8000 ÷ 625
≈ 12.8 cm

Answer(s): 12.8 cm