An empty rectangular tank has a capacity of 198 ℓ and a height of 48 cm. At 10 a.m., Tap E is turned on to fill the tank at a rate of 9 ℓ per minute for 16 minutes. After 3 minutes, Tap F 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 
9 ℓ = 9000 cm³ 
6 ℓ = 6000 cm³ 
198 ℓ = 198000 cm³

Volume of water flowed in from Tap E
= 16 x 9000
= 144000 cm³

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

Volume of water left in the tank
= 144000 - 96000
= 48000 cm³

Base area of the tank
= 198000 ÷ 48
= 4125 cm² 

Height of water left in the tank
= 48000 ÷ 4125
≈ 11.6 cm

Answer(s): 11.6 cm