An empty rectangular tank has a capacity of 47 ℓ and a height of 125 cm. At 6 a.m., Tap D is turned on to fill the tank at a rate of 10 ℓ per minute for 17 minutes. After 5 minutes, Tap E is turned on to drain water from the tank at a rate of 2 ℓ per minute for 5 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 
47 ℓ = 47000 cm³

Volume of water flowed in from Tap D
= 17 x 10000
= 170000 cm³

Volume of water from drained from Tap E
= 5 x 2000
= 10000 cm³

Volume of water left in the tank
= 170000 - 10000
= 160000 cm³

Base area of the tank
= 47000 ÷ 125
= 376 cm² 

Height of water left in the tank
= 160000 ÷ 376
≈ 425.5 cm

Answer(s): 425.5 cm