An empty rectangular container has a capacity of 162 ℓ and a height of 100 cm. At 7 a.m., Tap A is turned on to fill the container at a rate of 4 ℓ per minute for 20 minutes. After 2 minutes, Tap B is turned on to drain water from the container at a rate of 3 ℓ per minute for 13 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 
3 ℓ = 3000 cm³ 
162 ℓ = 162000 cm³

Volume of water flowed in from Tap A
= 20 x 4000
= 80000 cm³

Volume of water from drained from Tap B
= 13 x 3000
= 39000 cm³

Volume of water left in the container
= 80000 - 39000
= 41000 cm³

Base area of the container
= 162000 ÷ 100
= 1620 cm² 

Height of water left in the container
= 41000 ÷ 1620
≈ 25.3 cm

Answer(s): 25.3 cm