An empty rectangular tank has a capacity of 114 ℓ and a height of 200 cm. At 6 a.m., Tap U is turned on to fill the tank at a rate of 10 ℓ per minute for 19 minutes. After 4 minutes, Tap V is turned on to drain water from the tank at a rate of 6 ℓ per minute for 24 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 
6 ℓ = 6000 cm³ 
114 ℓ = 114000 cm³

Volume of water flowed in from Tap U
= 19 x 10000
= 190000 cm³

Volume of water from drained from Tap V
= 24 x 6000
= 144000 cm³

Volume of water left in the tank
= 190000 - 144000
= 46000 cm³

Base area of the tank
= 114000 ÷ 200
= 570 cm² 

Height of water left in the tank
= 46000 ÷ 570
≈ 80.7 cm

Answer(s): 80.7 cm