An empty rectangular container has a capacity of 136 ℓ and a height of 64 cm. At 7 a.m., Tap Y is turned on to fill the container at a rate of 4 ℓ per minute for 16 minutes. After 12 minutes, Tap Z is turned on to drain water from the container at a rate of 2 ℓ per minute for 25 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 
2 ℓ = 2000 cm³ 
136 ℓ = 136000 cm³

Volume of water flowed in from Tap Y
= 16 x 4000
= 64000 cm³

Volume of water from drained from Tap Z
= 25 x 2000
= 50000 cm³

Volume of water left in the container
= 64000 - 50000
= 14000 cm³

Base area of the container
= 136000 ÷ 64
= 2125 cm² 

Height of water left in the container
= 14000 ÷ 2125
≈ 6.6 cm

Answer(s): 6.6 cm