An empty rectangular tank has a capacity of 181 ℓ and a height of 40 cm. At 8 a.m., Tap F is turned on to fill the tank at a rate of 8 ℓ per minute for 20 minutes. After 8 minutes, Tap G is turned on to drain water from the tank at a rate of 6 ℓ per minute for 16 minutes. What is the height of the water level in the tank in the end? Give the answer in 1 decimal place.
1 ℓ = 1000 cm³ 
8 ℓ = 8000 cm³ 
6 ℓ = 6000 cm³ 
181 ℓ = 181000 cm³

Volume of water flowed in from Tap F
= 20 x 8000
= 160000 cm³

Volume of water from drained from Tap G
= 16 x 6000
= 96000 cm³

Volume of water left in the tank
= 160000 - 96000
= 64000 cm³

Base area of the tank
= 181000 ÷ 40
= 4525 cm² 

Height of water left in the tank
= 64000 ÷ 4525
≈ 14.1 cm

Answer(s): 14.1 cm