An empty rectangular tank has a capacity of 126 ℓ and a height of 75 cm. At 8 a.m., Tap D is turned on to fill the tank at a rate of 10 ℓ per minute for 16 minutes. After 4 minutes, Tap E is turned on to drain water from the tank at a rate of 2 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 
10 ℓ = 10000 cm³ 
2 ℓ = 2000 cm³ 
126 ℓ = 126000 cm³

Volume of water flowed in from Tap D
= 16 x 10000
= 160000 cm³

Volume of water from drained from Tap E
= 16 x 2000
= 32000 cm³

Volume of water left in the tank
= 160000 - 32000
= 128000 cm³

Base area of the tank
= 126000 ÷ 75
= 1680 cm² 

Height of water left in the tank
= 128000 ÷ 1680
≈ 76.2 cm

Answer(s): 76.2 cm