An empty rectangular tank has a capacity of 13 ℓ and a height of 125 cm. At 8 a.m., Tap H is turned on to fill the tank at a rate of 6 ℓ per minute for 18 minutes. After 10 minutes, Tap J is turned on to drain water from the tank at a rate of 8 ℓ per minute for 10 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 
6 ℓ = 6000 cm³ 
8 ℓ = 8000 cm³ 
13 ℓ = 13000 cm³

Volume of water flowed in from Tap H
= 18 x 6000
= 108000 cm³

Volume of water from drained from Tap J
= 10 x 8000
= 80000 cm³

Volume of water left in the tank
= 108000 - 80000
= 28000 cm³

Base area of the tank
= 13000 ÷ 125
= 104 cm² 

Height of water left in the tank
= 28000 ÷ 104
≈ 269.2 cm

Answer(s): 269.2 cm