An empty rectangular tank has a capacity of 108 ℓ and a height of 160 cm. At 6 a.m., Tap B is turned on to fill the tank at a rate of 7 ℓ per minute for 20 minutes. After 12 minutes, Tap C 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 
7 ℓ = 7000 cm³ 
6 ℓ = 6000 cm³ 
108 ℓ = 108000 cm³

Volume of water flowed in from Tap B
= 20 x 7000
= 140000 cm³

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

Volume of water left in the tank
= 140000 - 96000
= 44000 cm³

Base area of the tank
= 108000 ÷ 160
= 675 cm² 

Height of water left in the tank
= 44000 ÷ 675
≈ 65.2 cm

Answer(s): 65.2 cm