An empty rectangular container has a capacity of 37 ℓ and a height of 40 cm. At 10 a.m., Tap E is turned on to fill the container at a rate of 8 ℓ per minute for 18 minutes. After 2 minutes, Tap F is turned on to drain water from the container at a rate of 3 ℓ per minute for 23 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 
3 ℓ = 3000 cm³ 
37 ℓ = 37000 cm³

Volume of water flowed in from Tap E
= 18 x 8000
= 144000 cm³

Volume of water from drained from Tap F
= 23 x 3000
= 69000 cm³

Volume of water left in the container
= 144000 - 69000
= 75000 cm³

Base area of the container
= 37000 ÷ 40
= 925 cm² 

Height of water left in the container
= 75000 ÷ 925
≈ 81.1 cm

Answer(s): 81.1 cm